Gosund WP5 - Revision history

Leo: Added categories and navbox

2021-12-30T01:02:15Z

Added categories and navbox

← Older revision		Revision as of 01:02, 30 December 2021
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	*A teardown of the WP5: https://vmallet.com/2020/07/gosund-wp3-smart-plug-teardown-and-schematic/		*A teardown of the WP5: https://vmallet.com/2020/07/gosund-wp3-smart-plug-teardown-and-schematic/
	*esptool: https://github.com/espressif/esptool		*esptool: https://github.com/espressif/esptool

			{{Navbox Hardware}}
			{{Navbox Tinkering}}
			[[Category:Tinkering]]
			[[Category:Hardware]]

Leo: /* Tinkering */

2021-05-09T05:06:35Z

Tinkering

← Older revision		Revision as of 05:06, 9 May 2021
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	[[File:Gosund WP5 Back.jpg\|alt=The Gosund WP5 after it was opened.\|thumb\|149x149px\|The Gosund WP5 after it was opened.]]		[[File:Gosund WP5 Back.jpg\|alt=The Gosund WP5 after it was opened.\|thumb\|149x149px\|The Gosund WP5 after it was opened.]]
	Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. RubyBailey1 in his Instructables article suggests using some nails cut to length and inserted into all 3 prongs and hammering down to separate the casing from the back plate. However, this method will put a considerable amount of force on the PCB. I opted to just spudger my way in with some tiny flat headed screwdrivers. This will bend the outer casing, but can be mostly repaired by applying some hot air later. Imaged on the right is how it looks after prying apart the casing and then repairing it with some hot air.		Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. RubyBailey1 in his Instructables article suggests using some nails cut to length and inserted into all 3 prongs and hammering down to separate the casing from the back plate. However, this method will put a considerable amount of force on the PCB. I opted to just spudger my way in with some tiny flat headed screwdrivers. This will bend the outer casing, but can be mostly repaired by applying some hot air later. Imaged on the right is how it looks after prying apart the casing and then repairing it with some hot air.
			[[File:Gosund WP5 connections.jpg\|alt=Gosund WP5 connections\|left\|thumb\|141x141px\|Gosund WP5 connections]]
			To interact with the ESP8285 chip, we need access to 5 pins: the TX/RX serial, Vcc, ground, and GPIO0. Because the ESP8285 chip is soldered directly to the main board, these pins can only be accessed from the bottom of the PCB. Access to the underside of the PCB however, requires desoldering the connections to the mains prongs. Fortunately, Vcc is exposed as a test pad, ground is exposed at various places including the shielding on the ESP, and GPIO0 is exposed as test pad on the rear side of the chip. TX/RX can be accessed by carefully positioning some wires and affixing it with some tape.

	~~To connect to the ESP8285~~, ~~connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground~~ to the ~~metal shielding~~.		With some help with some helping hands, I was able to rig together something that connected all 5 pins as shown on the left.
	[[File:Gosund WP5 ESP Back.jpg\|alt=Gosund WP5 - The back side of the ESP is visible\|thumb\|148x148px\|Gosund WP5 - The back side of the ESP is visible. IO0 is highlighted.]]		[[File:Gosund WP5 ESP Back.jpg\|alt=Gosund WP5 - The back side of the ESP is visible\|thumb\|148x148px\|Gosund WP5 - The back side of the ESP is visible. IO0 is highlighted.]]

Line 113:		Line 115:
	After trying a few more times, it started working. It is most likely a sketchy connection that's causing this issue. Ensure the TX/RX pins are connected securely. This was fixed by redoing my serial connection again and making sure the tx/rx pins had a good connection.		After trying a few more times, it started working. It is most likely a sketchy connection that's causing this issue. Ensure the TX/RX pins are connected securely. This was fixed by redoing my serial connection again and making sure the tx/rx pins had a good connection.

	== Images ==		==Images==
	<gallery>		<gallery>
	File:Gosund WP5 ESP SoC.jpg\|alt=Gosund WP5 ESP8285 chip, front\|Gosund WP5 ESP8285 chip, front		File:Gosund WP5 ESP SoC.jpg\|alt=Gosund WP5 ESP8285 chip, front\|Gosund WP5 ESP8285 chip, front

Leo at 04:55, 9 May 2021

2021-05-09T04:55:50Z

← Older revision		Revision as of 04:55, 9 May 2021
Line 2:		Line 2:
	The Gosund WP5 is a cheap WiFi smart plug. I bought a 4 pack from Amazon during a sale for about $22 CAD. Internally, it uses the ESP8285 chip and is compatible with [[Tasmota]].		The Gosund WP5 is a cheap WiFi smart plug. I bought a 4 pack from Amazon during a sale for about $22 CAD. Internally, it uses the ESP8285 chip and is compatible with [[Tasmota]].

	Before you buy these however, be aware that you cannot load Tasmota over the air at the moment (if ever). The tuya-convert project has [https://github.com/ct-Open-Source/tuya-convert/wiki/Collaboration-document-for-PSK-Identity-02 detailed the issue on their Wiki], but it boils down to the PSK key that is used to communicate with the stock firmware to initiate a OTA update is now generated during the production of the plug at the factory rather than something that is generated algorithmically. You can still load Tasmota if you physically open up the plugs and connect to the serial pins of the ESP chip, something which I will document below.~~<gallery>~~		Before you buy these however, be aware that you cannot load Tasmota over the air at the moment (if ever). The tuya-convert project has [https://github.com/ct-Open-Source/tuya-convert/wiki/Collaboration-document-for-PSK-Identity-02 detailed the issue on their Wiki], but it boils down to the PSK key that is used to communicate with the stock firmware to initiate a OTA update is now generated during the production of the plug at the factory rather than something that is generated algorithmically. You can still load Tasmota if you physically open up the plugs and connect to the serial pins of the ESP chip, something which I will document below.
	~~File:Gosund WP5 ESP SoC.jpg\|alt=Gosund WP5 ESP8285 chip, front\|Gosund WP5 ESP8285 chip, front~~
	~~File:Gosund WP5 relay.jpg\|alt=Gosund WP5 relay\|Gosund WP5 relay~~
	~~</gallery>~~

	==Tinkering==		==Tinkering==
	[[File:Gosund WP5 Back.jpg\|alt=The Gosund WP5 after it was opened.\|thumb\|149x149px\|The Gosund WP5 after it was opened.]]		[[File:Gosund WP5 Back.jpg\|alt=The Gosund WP5 after it was opened.\|thumb\|149x149px\|The Gosund WP5 after it was opened.]]
Line 116:		Line 112:
	}}		}}
	After trying a few more times, it started working. It is most likely a sketchy connection that's causing this issue. Ensure the TX/RX pins are connected securely. This was fixed by redoing my serial connection again and making sure the tx/rx pins had a good connection.		After trying a few more times, it started working. It is most likely a sketchy connection that's causing this issue. Ensure the TX/RX pins are connected securely. This was fixed by redoing my serial connection again and making sure the tx/rx pins had a good connection.

			== Images ==
			<gallery>
			File:Gosund WP5 ESP SoC.jpg\|alt=Gosund WP5 ESP8285 chip, front\|Gosund WP5 ESP8285 chip, front
			File:Gosund WP5 relay.jpg\|alt=Gosund WP5 relay\|Gosund WP5 relay
			File:Gosund WP5 ESP Back.jpg
			File:Gosund WP5 Back.jpg
			File:Gosund WP5 Front.jpg
			</gallery>

	==See Also==		==See Also==

Leo: added more images

2021-05-09T04:54:32Z

added more images

← Older revision		Revision as of 04:54, 9 May 2021
Line 2:		Line 2:
	The Gosund WP5 is a cheap WiFi smart plug. I bought a 4 pack from Amazon during a sale for about $22 CAD. Internally, it uses the ESP8285 chip and is compatible with [[Tasmota]].		The Gosund WP5 is a cheap WiFi smart plug. I bought a 4 pack from Amazon during a sale for about $22 CAD. Internally, it uses the ESP8285 chip and is compatible with [[Tasmota]].

	Before you buy these however, be aware that you cannot load Tasmota over the air at the moment (if ever). The tuya-convert project has [https://github.com/ct-Open-Source/tuya-convert/wiki/Collaboration-document-for-PSK-Identity-02 detailed the issue on their Wiki], but it boils down to the PSK key that is used to communicate with the stock firmware to initiate a OTA update is now generated during the production of the plug at the factory rather than something that is generated algorithmically. You can still load Tasmota if you physically open up the plugs and connect to the serial pins of the ESP chip, something which I will document below.		Before you buy these however, be aware that you cannot load Tasmota over the air at the moment (if ever). The tuya-convert project has [https://github.com/ct-Open-Source/tuya-convert/wiki/Collaboration-document-for-PSK-Identity-02 detailed the issue on their Wiki], but it boils down to the PSK key that is used to communicate with the stock firmware to initiate a OTA update is now generated during the production of the plug at the factory rather than something that is generated algorithmically. You can still load Tasmota if you physically open up the plugs and connect to the serial pins of the ESP chip, something which I will document below.<gallery>
			File:Gosund WP5 ESP SoC.jpg\|alt=Gosund WP5 ESP8285 chip, front\|Gosund WP5 ESP8285 chip, front
			File:Gosund WP5 relay.jpg\|alt=Gosund WP5 relay\|Gosund WP5 relay
			</gallery>

	==Tinkering==		==Tinkering==

Leo at 04:33, 9 May 2021

2021-05-09T04:33:08Z

← Older revision		Revision as of 04:33, 9 May 2021
Line 1:		Line 1:
	The Gosund WP5 is a cheap WiFi smart plug. I bought a 4 pack from Amazon during a sale for about $22 CAD. Internally, it uses the ESP8285 chip and is compatible with Tasmota.		[[File:Gosund WP5 Front.jpg\|alt=Gosund WP5 Front\|thumb\|181x181px\|Gosund WP5 Front]]
			The Gosund WP5 is a cheap WiFi smart plug. I bought a 4 pack from Amazon during a sale for about $22 CAD. Internally, it uses the ESP8285 chip and is compatible with [[Tasmota]].

	Before you buy these however, be aware that you cannot load Tasmota over the air at the moment (if ever). The tuya-convert project has [https://github.com/ct-Open-Source/tuya-convert/wiki/Collaboration-document-for-PSK-Identity-02 detailed the issue on their Wiki], but it boils down to the PSK key that is used to communicate with the stock firmware to initiate a OTA update is now generated during the production of the plug at the factory rather than something that is generated algorithmically. You can still load Tasmota if you physically open up the plugs and connect to the serial pins of the ESP chip, something which I will document below.		Before you buy these however, be aware that you cannot load Tasmota over the air at the moment (if ever). The tuya-convert project has [https://github.com/ct-Open-Source/tuya-convert/wiki/Collaboration-document-for-PSK-Identity-02 detailed the issue on their Wiki], but it boils down to the PSK key that is used to communicate with the stock firmware to initiate a OTA update is now generated during the production of the plug at the factory rather than something that is generated algorithmically. You can still load Tasmota if you physically open up the plugs and connect to the serial pins of the ESP chip, something which I will document below.

	==Tinkering==		==Tinkering==
	Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. RubyBailey1 in his Instructables article suggests using some nails cut to length and inserted into all 3 prongs and hammering down to separate the casing from the back plate. However, this method will put a considerable amount of force on the PCB. I opted to just spudger my way in with some tiny flat headed screwdrivers. This will bend the outer casing, but can be mostly repaired by applying some hot air later.		[[File:Gosund WP5 Back.jpg\|alt=The Gosund WP5 after it was opened.\|thumb\|149x149px\|The Gosund WP5 after it was opened.]]
			Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. RubyBailey1 in his Instructables article suggests using some nails cut to length and inserted into all 3 prongs and hammering down to separate the casing from the back plate. However, this method will put a considerable amount of force on the PCB. I opted to just spudger my way in with some tiny flat headed screwdrivers. This will bend the outer casing, but can be mostly repaired by applying some hot air later. Imaged on the right is how it looks after prying apart the casing and then repairing it with some hot air.

	To connect to the ESP8285, connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground to the metal shielding.		To connect to the ESP8285, connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground to the metal shielding.
			[[File:Gosund WP5 ESP Back.jpg\|alt=Gosund WP5 - The back side of the ESP is visible\|thumb\|148x148px\|Gosund WP5 - The back side of the ESP is visible. IO0 is highlighted.]]

	=== Entering UART bootloader / programming mode ===		===Entering UART bootloader / programming mode===
	Like the other ESP8266 chips, you can enter the UART bootloader (aka. flash or programming mode) by grounding GPIO0. For more information, see [[ESP8266#Boot%20Modes\|ESP8266 Boot Modes]]. In the Gosund WP5, GPIO0 is exposed as a test point labeled IO0 on the rear side of the board. Ground this when powering on the chip will bring the ESP into this mode.		Like the other ESP8266 chips, you can enter the UART bootloader (aka. flash or programming mode) by grounding GPIO0. For more information, see [[ESP8266#Boot%20Modes\|ESP8266 Boot Modes]]. In the Gosund WP5, GPIO0 is exposed as a test point labeled IO0 on the rear side of the board. Ground this when powering on the chip will bring the ESP into this mode.

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	After obtaining the firmware, you can extract the stock PSK key by running strings on the binary. This information might be useful for the tuya-convert community to help them potentially finding out how the PSK keys are generated.		After obtaining the firmware, you can extract the stock PSK key by running strings on the binary. This information might be useful for the tuya-convert community to help them potentially finding out how the PSK keys are generated.

	==== Digest mismatch issue ====		====Digest mismatch issue====
	When trying to dump the firmware with <code>esptool</code>, I kept getting a digest mismatch error:		When trying to dump the firmware with <code>esptool</code>, I kept getting a digest mismatch error:
	{{Highlight		{{Highlight

Leo at 04:21, 9 May 2021

2021-05-09T04:21:33Z

← Older revision		Revision as of 04:21, 9 May 2021
Line 1:		Line 1:
	The Gosund WP5 is a cheap smart plug. Internally, it uses the ESP8285 chip. Before you buy these, be aware that you cannot load Tasmota over the air at the moment (if ever) ~~because most (all?) new smart plugs~~ that ~~utilizes~~ the ~~Tuya platform are~~ now ~~assigned a randomized PSK key from~~ the factory ~~and~~ is ~~not compatible with~~ Tasmota~~-Convert~~.		The Gosund WP5 is a cheap WiFi smart plug. I bought a 4 pack from Amazon during a sale for about $22 CAD. Internally, it uses the ESP8285 chip and is compatible with Tasmota.

			Before you buy these however, be aware that you cannot load Tasmota over the air at the moment (if ever). The tuya-convert project has [https://github.com/ct-Open-Source/tuya-convert/wiki/Collaboration-document-for-PSK-Identity-02 detailed the issue on their Wiki], but it boils down to the PSK key that is used to communicate with the stock firmware to initiate a OTA update is now generated during the production of the plug at the factory rather than something that is generated algorithmically. You can still load Tasmota if you physically open up the plugs and connect to the serial pins of the ESP chip, something which I will document below.

	==Tinkering==		==Tinkering==
	Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. ~~Try not~~ to ~~rip~~ the ~~side~~ casing~~; minor bends and distortions~~ can be repaired ~~with~~ a ~~heat gun~~.		Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. RubyBailey1 in his Instructables article suggests using some nails cut to length and inserted into all 3 prongs and hammering down to separate the casing from the back plate. However, this method will put a considerable amount of force on the PCB. I opted to just spudger my way in with some tiny flat headed screwdrivers. This will bend the outer casing, but can be mostly repaired by applying some hot air later.

			To connect to the ESP8285, connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground to the metal shielding.

			=== Entering UART bootloader / programming mode ===
			Like the other ESP8266 chips, you can enter the UART bootloader (aka. flash or programming mode) by grounding GPIO0. For more information, see [[ESP8266#Boot%20Modes\|ESP8266 Boot Modes]]. In the Gosund WP5, GPIO0 is exposed as a test point labeled IO0 on the rear side of the board. Ground this when powering on the chip will bring the ESP into this mode.

	~~To connect to~~ the ~~ESP8285, connect TX to RX~~ and ~~vice versa via~~ a ~~shift level to a USB UART. Connect 3.3v power using~~ the ~~3v3 pad and ground to the metal shielding. Enter flash mode by grounding IO0 during power on~~.		The ESP chip when loaded into this mode will draw approximately 0.11 watts instead of the usual 0.26 watts and gives a good indication of which mode the chip is in.

	===Dumping firmware===		===Dumping stock firmware===
	~~Trying~~ to dump the firmware with esptool, ~~but am~~ getting ~~this issue~~:		Use <code>esptool</code> to read the firmware. Run the following command to extract the firmware from the ESP chip.
			{{Highlight
			\| code = $ python -m esptool --port /dev/ttyUSB0 --baud 115200 --chip auto read_flash 0 0x100000 firmware.bin
			esptool.py v3.0
			Serial port /dev/ttyUSB0
			Connecting...
			Detecting chip type... ESP8266
			Chip is ESP8285
			Features: WiFi, Embedded Flash
			Crystal is 26MHz
			MAC: c4:dd:57:03:53:c0
			Uploading stub...
			Running stub...
			Stub running...
			1048576 (100 %)
			1048576 (100 %)
			Read 1048576 bytes at 0x0 in 95.5 seconds (87.8 kbit/s)...
			Hard resetting via RTS pin...
			\| lang = terminal
			}}
			After obtaining the firmware, you can extract the stock PSK key by running strings on the binary. This information might be useful for the tuya-convert community to help them potentially finding out how the PSK keys are generated.

			==== Digest mismatch issue ====
			When trying to dump the firmware with <code>esptool</code>, I kept getting a digest mismatch error:
	{{Highlight		{{Highlight
	\| code = $ python -m esptool --port /dev/ttyUSB0 --chip auto read_flash 0 0x100000 firmware.bin		\| code = $ python -m esptool --port /dev/ttyUSB0 --chip auto read_flash 0 0x100000 firmware.bin
Line 27:		Line 57:
	\| lang = terminal		\| lang = terminal
	}}		}}
	~~Trying again at~~ 9600 baud worked.		Using a slower speed (9600 baud) worked. The issue was intermittent probably because of a sketchy serial connection.

	=== Loading Tasmota ===		===Loading Tasmota===
	{{Highlight		Download the most recent version of Tasmota from http://ota.tasmota.com/tasmota/release/. Using esptool, erase and then flash the firmware.{{Highlight
	\| code = ~~gosund %~~ python -m esptool --port /dev/ttyUSB0 erase_flash		\| code = $ python -m esptool --port /dev/ttyUSB0 erase_flash
	esptool.py v3.0		esptool.py v3.0
	Serial port /dev/ttyUSB0		Serial port /dev/ttyUSB0
Line 46:		Line 76:
	Chip erase completed successfully in 0.9s		Chip erase completed successfully in 0.9s
	Hard resetting via RTS pin...		Hard resetting via RTS pin...
	~~gosund %~~ python -m esptool --port /dev/ttyUSB0 write_flash -fs 1MB -fm dout 0x0 tasmota.bin
			## Reset and bring device back into flash mode
			$ python -m esptool --port /dev/ttyUSB0 write_flash -fs 1MB -fm dout 0x0 tasmota.bin
	esptool.py v3.0		esptool.py v3.0
	Serial port /dev/ttyUSB0		Serial port /dev/ttyUSB0
Line 73:		Line 105:
	When trying to dump the firmware from the ESP, I kept on getting this error message:		When trying to dump the firmware from the ESP, I kept on getting this error message:
	{{Highlight		{{Highlight
	\| code = Unsupported Command Error received. Probably this means Secure Download Mode is enabled, autodetection will not work. Need to manually specify the chip.		\| code = Unsupported Command Error received. Probably this means Secure Download Mode is
			enabled, autodetection will not work. Need to manually specify the chip.
	\| lang = terminal		\| lang = terminal
	}}		}}
	After trying a few more times, it started working. It is most likely a sketchy connection that's causing this issue. Ensure the TX/RX pins are connected securely.		After trying a few more times, it started working. It is most likely a sketchy connection that's causing this issue. Ensure the TX/RX pins are connected securely. This was fixed by redoing my serial connection again and making sure the tx/rx pins had a good connection.

	==See Also==		==See Also==
Line 83:		Line 116:
	*Guide on opening the WP5: https://www.instructables.com/Downloading-Tasmota-Onto-a-Gosund-WP5-or-WP3-Smart/		*Guide on opening the WP5: https://www.instructables.com/Downloading-Tasmota-Onto-a-Gosund-WP5-or-WP3-Smart/
	*A teardown of the WP5: https://vmallet.com/2020/07/gosund-wp3-smart-plug-teardown-and-schematic/		*A teardown of the WP5: https://vmallet.com/2020/07/gosund-wp3-smart-plug-teardown-and-schematic/
			*esptool: https://github.com/espressif/esptool

Leo at 03:25, 8 May 2021

2021-05-08T03:25:54Z

@@ Line 6: / Line 6: @@
 To connect to the ESP8285, connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground to the metal shielding. Enter flash mode by grounding IO0 during power on.
-==Dumping firmware==
+===Dumping firmware===
 Trying to dump the firmware with esptool, but am getting this issue:
 {{Highlight
@@ Line 27: / Line 27: @@
 | lang = terminal
 }}
-Trying again at 9600 baud.
+Trying again at 9600 baud worked.
-== Troubleshooting ==
+=== Loading Tasmota ===
-=== Esptool cannot connect ===
+===Esptool cannot connect===
 When trying to dump the firmware from the ESP, I kept on getting this error message:
 {{Highlight

Leo at 02:48, 8 May 2021

2021-05-08T02:48:32Z

← Older revision		Revision as of 02:48, 8 May 2021
Line 1:		Line 1:
	The Gosund WP5 is a cheap smart plug. Internally, it uses the ESP8285 chip. Before you buy these, be aware that you cannot load Tasmota over the air at the moment (if ever) because most (all?) new smart plugs that utilizes the Tuya platform are now assigned a randomized PSK key from the factory and is not compatible with Tasmota-Convert.		The Gosund WP5 is a cheap smart plug. Internally, it uses the ESP8285 chip. Before you buy these, be aware that you cannot load Tasmota over the air at the moment (if ever) because most (all?) new smart plugs that utilizes the Tuya platform are now assigned a randomized PSK key from the factory and is not compatible with Tasmota-Convert.

	== Tinkering ==		==Tinkering==
	Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. Try not to rip the side casing; minor bends and distortions can be repaired with a heat gun.		Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. Try not to rip the side casing; minor bends and distortions can be repaired with a heat gun.

	To connect to the ESP8285, connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground to the metal shielding. Enter flash mode by grounding IO0 during power on.		To connect to the ESP8285, connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground to the metal shielding. Enter flash mode by grounding IO0 during power on.

	== Dumping firmware ==		==Dumping firmware==
	Trying to dump the firmware with esptool, but am getting this issue:		Trying to dump the firmware with esptool, but am getting this issue:
	{{Highlight		{{Highlight
Line 29:		Line 29:
	Trying again at 9600 baud.		Trying again at 9600 baud.

	== ~~See Also~~ ==		== Troubleshooting ==

	* Tasmota template, listing GPIO pins: https://templates.blakadder.com/gosund_WP5.html		=== Esptool cannot connect ===
	* Guide on opening the WP5: https://www.instructables.com/Downloading-Tasmota-Onto-a-Gosund-WP5-or-WP3-Smart/		When trying to dump the firmware from the ESP, I kept on getting this error message:
	* A teardown of the WP5: https://vmallet.com/2020/07/gosund-wp3-smart-plug-teardown-and-schematic/		{{Highlight
			\| code = Unsupported Command Error received. Probably this means Secure Download Mode is enabled, autodetection will not work. Need to manually specify the chip.
			\| lang = terminal
			}}
			After trying a few more times, it started working. It is most likely a sketchy connection that's causing this issue. Ensure the TX/RX pins are connected securely.

			==See Also==

			*Tasmota template, listing GPIO pins: https://templates.blakadder.com/gosund_WP5.html
			*Guide on opening the WP5: https://www.instructables.com/Downloading-Tasmota-Onto-a-Gosund-WP5-or-WP3-Smart/
			*A teardown of the WP5: https://vmallet.com/2020/07/gosund-wp3-smart-plug-teardown-and-schematic/

Leo: Created page with "The Gosund WP5 is a cheap smart plug. Internally, it uses the ESP8285 chip. Before you buy these, be aware that you cannot load Tasmota over the air at the moment (if ever) be..."

2021-05-08T02:45:21Z

Created page with "The Gosund WP5 is a cheap smart plug. Internally, it uses the ESP8285 chip. Before you buy these, be aware that you cannot load Tasmota over the air at the moment (if ever) be..."

New page

The Gosund WP5 is a cheap smart plug. Internally, it uses the ESP8285 chip. Before you buy these, be aware that you cannot load Tasmota over the air at the moment (if ever) because most (all?) new smart plugs that utilizes the Tuya platform are now assigned a randomized PSK key from the factory and is not compatible with Tasmota-Convert.

== Tinkering ==
Open the WP5 by prying on the back side of the plug, separating the outer casing from the inner circular plate. Try not to rip the side casing; minor bends and distortions can be repaired with a heat gun.

To connect to the ESP8285, connect TX to RX and vice versa via a shift level to a USB UART. Connect 3.3v power using the 3v3 pad and ground to the metal shielding. Enter flash mode by grounding IO0 during power on.

== Dumping firmware ==
Trying to dump the firmware with esptool, but am getting this issue:
{{Highlight
| code = $ python -m esptool --port /dev/ttyUSB0 --chip auto read_flash 0 0x100000 firmware.bin
esptool.py v3.0
Serial port /dev/ttyUSB0
Connecting........_____....._
Detecting chip type... ESP8266
Chip is ESP8285
Features: WiFi, Embedded Flash
Crystal is 26MHz
MAC: c4:dd:57:0d:2c:de
Uploading stub...
Running stub...
Stub running...
1048576 (100 %)
1048576 (100 %)

A fatal error occurred: Digest mismatch: expected 9B60686A442B0A68591CFB54D28B867B, got 458345CAB9C61F97AAB45943ED64C234
| lang = terminal
}}
Trying again at 9600 baud.

== See Also ==

* Tasmota template, listing GPIO pins: https://templates.blakadder.com/gosund_WP5.html
* Guide on opening the WP5: https://www.instructables.com/Downloading-Tasmota-Onto-a-Gosund-WP5-or-WP3-Smart/
* A teardown of the WP5: https://vmallet.com/2020/07/gosund-wp3-smart-plug-teardown-and-schematic/