Problem with CJMCU-811

[GillesC]

Hello

First of all thank you for making this library!
I'm unable to get your test file working.

Connection:
Loenardo............................CJMCU-811
3.3V......................................VCC
GND.....................................GND
GND.....................................ADD
PIN_2...................................SDA
PIN-3...................................SCL
PIN_4...................................WAK
PIN-7...................................INT

I get the following error:
Error: Incorrect Hardware ID detected.
I've written out the hw_id which is 0xFF.

Kind regards,
Gilles Callebaut

[AKstudios]

This happens when the timing sequence for initialization isn't correct. Try adding some more delay. Also, try power-cycling the chip.

[GillesC]

I'll give it a try. Thank you for your time!
I'll close this issue when the problem is resolved.

[AKstudios]

The example code in the library should work. Try switching to a 0.1uF cap and power cycle the circuit with sufficient time between each cycle (so cap is discharged).

Note that this a relatively new sensor, so it's possible there are some earlier finicky versions around in the market. It's also a bit tricky to get it reflowed correctly the first time since the pads are so small.

[arronstone]

@GillesC has it worked for you ?
Please share details if it worked, as i am also facing the same issue.

[GillesC]

Hey, I haven't got the time to resolve this issue. I tried to increase some delays but without success.

…

On Thu, 13 Apr 2017, 18:09 arronstone, ***@***.***> wrote: @GillesC <https://github.com/GillesC> has it worked for you ? Please share details if it worked, as i am also facing the same issue. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#2 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AIOhi2EW2WX2P-_puCR51VGUycxHI3mFks5rvkjDgaJpZM4MeANL> .

[AKstudios]

The library has been updated; should allow more time before first communication.

[a-andreyev]

tried today with CJMCU-811, working for me

[madhujiot]

Today, I got from Aliexpress the CJMCU-811 module and am trying to configure and run the CCS811-library example given in this repository, but facing below issue. Please suggest what could be wrong and appreciate your help.

My connections for the Arduino to CJMCU-811
Arduino <-----> CJMCU-811
3.3V <-----> VCC
GND <-----> GDN
GND <-----> ADD
A4 <-----> SDA
A5 <-----> SCL
PIN_4(PWM) <-----> WAK
NA <-----> INT
NA <-----> RST

*NA = unused

COM port output(9600baud) per below:

CCS811 test
Error: Incorrect Hardware ID detected.
Initialization failed.
CO2 concentration : 30720 ppm
TVOC concentration : -29344 ppb

CO2 concentration : 30720 ppm
TVOC concentration : -29344 ppb

CO2 concentration : 30720 ppm
TVOC concentration : -29344 ppb

Thank you,
Madhu

[coolchip]

I²C Address should be 0x5A or 0x5B. Perhaps this helps.