Difference between revisions of "CO2MeterHacking"

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== Investigation ==
 
== Investigation ==
The CO2 meter at RevSpace has a sticker saying ZGw063RY.
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The CO2 sensor at RevSpace has a sticker saying ZGw063RY.
Unfortunately, this is not the module that is often found on the internet, with a protocol documentation.
+
Googling for this number reveals a CO2 sensor that looks just like the Voltcraft CO-100, so it appears that the CO-100 is basically just a rebranded [http://www.zyaura.com/products/ZGw063.asp ZyAura ZGw063RY] module.
 +
 
 +
Unfortunately, the sensor module inside the CO-100 does not look like a Telaire TL-XXXX or a MH-Z14 (for which there *is* some documentation of the protocol available).
  
 
Also, the CO2 meter at RevSpace seems to miss a bunch of components that can be mounted on the PCB, close to the RJ45 connection (possibly an RS232 chip with step-up capacitors).
 
Also, the CO2 meter at RevSpace seems to miss a bunch of components that can be mounted on the PCB, close to the RJ45 connection (possibly an RS232 chip with step-up capacitors).
 +
(TODO foto).

Revision as of 17:51, 17 March 2014

Project CO2MeterHacking
Status Initializing
Contact bertrik
Last Update 2014-03-17

Introduction

This project is about hacking the Voltcraft CO-100 CO2-sensor, such that we can read the exact ppm value as displayed on the LCD.

This particular CO2-sensor is present in the klusbunker at RevSpace and is currently used to control the ventilation in a crude manner (by monitoring the warning LEDs on the display module). Having the CO2 ppm value available as a number allows for nice things such as logging the levels over time, announce them on IRC, show them on the LedBanner , etc.

The user manual of the Voltcraft CO-100 says "Attention! The RJ45 connection (see chapter 7, item „K“) must not be used. The connection is only intended for the manufacturer". Of course, a claim like that can only be interpreted as a challenge! :)

Investigation

The CO2 sensor at RevSpace has a sticker saying ZGw063RY. Googling for this number reveals a CO2 sensor that looks just like the Voltcraft CO-100, so it appears that the CO-100 is basically just a rebranded ZyAura ZGw063RY module.

Unfortunately, the sensor module inside the CO-100 does not look like a Telaire TL-XXXX or a MH-Z14 (for which there *is* some documentation of the protocol available).

Also, the CO2 meter at RevSpace seems to miss a bunch of components that can be mounted on the PCB, close to the RJ45 connection (possibly an RS232 chip with step-up capacitors). (TODO foto).