MH-Z19B: Difference between revisions
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(Created page with " {{Project |Name=MH-Z19B |Omschrijving=Some research into the MH-Z19B CO<sub>2</sub> sensor |Status=Initializing |Contact=Disasm }}") |
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{{Project | {{Project | ||
|Name=MH-Z19B | |Name=MH-Z19B | ||
|Picture=mhz19.jpg | |||
|Omschrijving=Some research into the MH-Z19B CO<sub>2</sub> sensor | |Omschrijving=Some research into the MH-Z19B CO<sub>2</sub> sensor | ||
|Status=Initializing | |Status=Initializing | ||
|Contact=Disasm | |Contact=Disasm | ||
}} | }} | ||
== Introduction == | |||
MH-Z19B is an updated version of the [[MHZ19|MH-Z19]] sensor. | |||
== Hardware == | |||
* STM32F051K86 MCU | |||
* Unknown analog light+temperature sensor | |||
* Two 3.3V regulators | |||
* 1.5V voltage reference | |||
* Lamp | |||
== Firmware == | |||
MCU firmware can be easily dumped through SWD test pads. Pinout: | |||
{| class="wikitable" | |||
|- | |||
! Pin !! Signal | |||
|- | |||
| 1 (square) || 3V3 | |||
|- | |||
| 2 || GND | |||
|- | |||
| 3 || SWDIO | |||
|- | |||
| 4 || SWCLK | |||
|- | |||
| 5 || RESET (active low) | |||
|} | |||
Additionally, bootloader asks for a firmware update during the first 20s of startup. | |||
Revision as of 13:52, 1 October 2019
| Project MH-Z19B | |
|---|---|
| |
| Some research into the MH-Z19B CO2 sensor | |
| Status | Initializing |
| Contact | Disasm |
| Last Update | 2019-10-01 |
Introduction
MH-Z19B is an updated version of the MH-Z19 sensor.
Hardware
- STM32F051K86 MCU
- Unknown analog light+temperature sensor
- Two 3.3V regulators
- 1.5V voltage reference
- Lamp
Firmware
MCU firmware can be easily dumped through SWD test pads. Pinout:
| Pin | Signal |
|---|---|
| 1 (square) | 3V3 |
| 2 | GND |
| 3 | SWDIO |
| 4 | SWCLK |
| 5 | RESET (active low) |
Additionally, bootloader asks for a firmware update during the first 20s of startup.