VINDRIKTNING - Revision history

Bertrik Sikken at 12:10, 28 July 2022

2022-07-28T12:10:57Z

← Older revision		Revision as of 12:10, 28 July 2022
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	\|Picture=VINDRIKTNING.png		\|Picture=VINDRIKTNING.png
	\|Omschrijving=Hacking IKEA VINDRIKTNING PM2.5 indicator		\|Omschrijving=Hacking IKEA VINDRIKTNING PM2.5 indicator
	\|Status=~~In progress~~		\|Status=Completed
	\|Contact=bertrik		\|Contact=bertrik
	}}		}}

Bertrik Sikken: /* Hardware */

2022-03-13T11:56:00Z

Hardware

← Older revision		Revision as of 11:56, 13 March 2022
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	* there is an 8-pin IC, which is the microcontroller, an ES7P001		* there is an 8-pin IC, which is the microcontroller, an ES7P001
	* there is a light-sensing element, that controls the brightness of the LED		* there is a light-sensing element, that controls the brightness of the LED

			With no PM1006 attached at all, the sensor indicates "green", or good air quality!

	More pictures of its internals, with reverse-engineered schematics:		More pictures of its internals, with reverse-engineered schematics:

Bertrik Sikken: /* Hacking */

2022-03-13T11:55:39Z

Hacking

← Older revision		Revision as of 11:55, 13 March 2022
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	== Hacking ==		== Hacking ==
	~~The~~ microcontroller is an ~~ES7P001~~.		What I've done is remove the existing microcontroller entirely (hot air gun) and replace it with an ESP8266 that reads out the raw PM value.
			This means I've soldered wires to internal test pads and attached them to a Wemos D1 mini board.

	~~Idea: Fit an ESP8266 that reads out~~ the ~~raw PM value and publish it over WiFi, e.g. using a home assistant compatible protocol.~~		Mapping of the internal pads to the wemos D1 mini:

	~~With no PM1006 attached at all, the sensor indicates "green", or good air quality!~~

	~~What I've done:~~
	* Remove the existing microcontroller entirely
	* Solder wires to the ~~internal test pads and attach a Wemos~~ D1 mini~~, the serial line resistors are used to limit the current in the serial lines, due to 5V/3.3V interface issues.~~

	~~Pinout~~:
	* Wemos D1 mini D2 -> PM1006 RX = "ISPDA" pad		* Wemos D1 mini D2 -> PM1006 RX = "ISPDA" pad
	* Wemos D1 mini D1 -> PM1006 TX = "RESET" pad		* Wemos D1 mini D1 -> PM1006 TX = "RESET" pad

Bertrik Sikken: /* Hardware */

2022-03-13T11:52:41Z

Hardware

← Older revision		Revision as of 11:52, 13 March 2022
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	* there is an internal header with signals LED_G_1, PWM_Fan, LED_R_1, FAN-, FAN+		* there is an internal header with signals LED_G_1, PWM_Fan, LED_R_1, FAN-, FAN+
	* there is a separate header for the fan with signals FAN+,FAN-		* there is a separate header for the fan with signals FAN+,FAN-
	* there is an 8-pin IC, ~~could this be~~ the ~~"main"~~ microcontroller?		* there is an 8-pin IC, which is the microcontroller, an ES7P001
	* there is a light-sensing element, that controls the brightness of the LED		* there is a light-sensing element, that controls the brightness of the LED

Bertrik Sikken: /* Interfacing with ESP8266 */

2022-03-13T08:57:24Z

Interfacing with ESP8266

← Older revision		Revision as of 08:57, 13 March 2022
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	The datasheet of the PM1006 mentions that it takes 5V as power and communicates using 4.5V levels.		The datasheet of the PM1006 mentions that it takes 5V as power and communicates using 4.5V levels.
	The reverse-engineered schematic shows resistors in line with the RX and TX lines.		The reverse-engineered schematic shows resistors in line with the RX and TX lines.
	An ESP8266 should be 5V tolerant. This means that it is ~~probably~~ possible to directly connect an ESP8266 in place of the original microcontroller.		An ESP8266 should be 5V tolerant [https://www.ridiculously-simple.com/2021/05/19/are-the-esp32-and-esp8266-5v-tolerant-yes-they-officially-are/ (link)]. This means that it is possible to directly connect an ESP8266 in place of the original microcontroller.
			The series resistor limit the current from the PM1006 TX line into the ESP8266 RX line.
	The series ~~resistors limits~~ the current from the PM1006 TX line into the ESP8266 RX line.

	== Hacking ==		== Hacking ==

Bertrik Sikken: /* What */

2022-03-13T08:49:08Z

What

← Older revision		Revision as of 08:49, 13 March 2022
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	The software on the ESP8266 allows me to interactively send commands to the PM sensor.		The software on the ESP8266 allows me to interactively send commands to the PM sensor.

	Another approach is to leave in the original microcontroller and add an ESP8266 to just snoop to the commands exchanged between the original microcontroller and the PM sensor.		Another approach is to leave in the original microcontroller and add an ESP8266 to just snoop the commands exchanged between the original microcontroller and the PM sensor.
	This is perhaps more useful if you just want to use the indicator light as a sensor in your home automation setup.		This is perhaps more useful if you just want to use the indicator light as a sensor in your home automation setup.
	More information can be found there: https://esphome.io/components/sensor/pm1006.html		More information can be found there: https://esphome.io/components/sensor/pm1006.html

Bertrik Sikken: /* Experimentation */

2022-03-07T10:57:36Z

Experimentation

← Older revision		Revision as of 10:57, 7 March 2022
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	I wonder if perhaps this thing also has a "secret" temperature sensor that can be read.		I wonder if perhaps this thing also has a "secret" temperature sensor that can be read.
	The datasheet (PM1006_LED_PARTICLE_SENSOR_MODULE_SPECIFICATIONS.pdf) mentions: "Integrated temperature sensor, temperature compensation within the whole temperature range"		The datasheet (PM1006_LED_PARTICLE_SENSOR_MODULE_SPECIFICATIONS.pdf) mentions: "Integrated temperature sensor, temperature compensation within the whole temperature range".
			However I could not see any value in any of the responses that seems to correlate with temperature.

	== Software ==		== Software ==
	Code for an ESP8266 (Wemos D1 mini) to communicate with the PM1006 sensor inside this device can be found at		Code for an ESP8266 (Wemos D1 mini) to communicate with the PM1006 sensor inside this device can be found at
	https://github.com/bertrik/pm1006		https://github.com/bertrik/pm1006

Bertrik Sikken: /* What */

2022-03-07T10:54:42Z

What

← Older revision		Revision as of 10:54, 7 March 2022
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	This page is about hacking the IKEA [https://www.ikea.com/nl/nl/p/vindriktning-luchtkwaliteitsensor-70498242/ VINDRIKTNING] PM2.5 indicator light.		This page is about hacking the IKEA [https://www.ikea.com/nl/nl/p/vindriktning-luchtkwaliteitsensor-70498242/ VINDRIKTNING] PM2.5 indicator light.

	I~~'ve~~ removed the original microcontroller and installed an ESP8266 to talk to the particulate matter (PM) sensor, control the LEDs and the fan.		I have removed the original microcontroller and installed an ESP8266 to talk to the particulate matter (PM) sensor, control the LEDs and the fan.
	The software on the ESP8266 allows me to interactively send commands to the PM sensor.		The software on the ESP8266 allows me to interactively send commands to the PM sensor.

	Another approach is to leave in the original microcontroller and add an ESP8266 to just snoop to the commands exchanged between the original microcontroller and the PM sensor.		Another approach is to leave in the original microcontroller and add an ESP8266 to just snoop to the commands exchanged between the original microcontroller and the PM sensor.
			This is perhaps more useful if you just want to use the indicator light as a sensor in your home automation setup.
			More information can be found there: https://esphome.io/components/sensor/pm1006.html

	== Hardware ==		== Hardware ==

Bertrik Sikken: /* Experimentation */

2022-03-07T07:21:28Z

Experimentation

← Older revision		Revision as of 07:21, 7 March 2022
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	Perhaps the 0x2D number is a kind of estimate for PM10, it seems to be correlated to PM2.5, but always higher in value.		Perhaps the 0x2D number is a kind of estimate for PM10, it seems to be correlated to PM2.5, but always higher in value.
			The 0x3A7 (935 in decimal) could be some kind of timing parameter, e.g. equivalent number of milliseconds high or low time.
	The 0x0C value is always the same.		The 0x0C value is always the same.

Bertrik Sikken: /* What */

2022-03-06T19:00:05Z

What

← Older revision		Revision as of 19:00, 6 March 2022
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	This page is about hacking the IKEA [https://www.ikea.com/nl/nl/p/vindriktning-luchtkwaliteitsensor-70498242/ VINDRIKTNING] PM2.5 indicator light.		This page is about hacking the IKEA [https://www.ikea.com/nl/nl/p/vindriktning-luchtkwaliteitsensor-70498242/ VINDRIKTNING] PM2.5 indicator light.

	I've removed the original microcontroller and installed an ESP8266 to talk to the PM sensor, control the LEDs and the fan.		I've removed the original microcontroller and installed an ESP8266 to talk to the particulate matter (PM) sensor, control the LEDs and the fan.
	The software on the ESP8266 allows me to interactively send commands to the PM sensor.		The software on the ESP8266 allows me to interactively send commands to the PM sensor.

			Another approach is to leave in the original microcontroller and add an ESP8266 to just snoop to the commands exchanged between the original microcontroller and the PM sensor.

	== Hardware ==		== Hardware ==