nWake issue

[hoangv]

Hi @maarten-pennings, thanks for this library, it is very helpful. I am having trouble getting nWAKE to work. Do you have any suggestions to troubleshoot?

I can get ccs811basic working fine as long as I have nWake directly connected to GND. The wiring is correct and matches the README.md for ESP8266. Whenever I wire D3 to nWake and use ccs811(D3), I get: ccs811: ping failed (VDD/GND connected? SDA/SCL connected?). I am using Wemos D1 mini with CJMCU-811. I also tried using D4 pin instead of D3, and also tried flashing from 1.1 to 2.0, but still see the same error.

[maarten-pennings]

Hi @hoangv, I'm a bit puzzled too, so allow me to ask some questions.

• you have an esp8266 and some ccs811 board
• you have 5 wires between the two boards: VDD to 3V3, GND to GND, SDA to D2, SCL to D1, and nWAKE to D3
• you run the standard ccs811basic.ino sketch without any modifications
• it does not work (you get ping failed)
• you change one wire (nWAKE to D3 into nWAKE to GND) and then it does work (no changes to the software)?

[hoangv]

Hi @maarten-pennings, yes that was the situation yesterday. This morning, I decided to start over with a new ESP8266 and rewired everything. nWake appears to be working as expected. I did not have a chance to troubleshoot further, but think it was either an issue with soldering, or with the ESP8266 module itself. Thanks again. Closing this out.