ESP32 ERRO I2C - Githubissues

maarten-pennings / CCS811

Arduino library for the CCS811 gas sensor for monitoring indoor air quality.

MIT License

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ESP32 ERRO I2C #60

Closed juka-lp closed 3 years ago

juka-lp commented 3 years ago

I'm having a problem with the ccs811, and for days I can't find the reason. When I run CCS811 Basic, I get the error "CCS811: I2C error" And even if I try to update the firmware, I get the error:

Starting CCS811 flasher setup: library version: 10 ccs811: ping failed (VDD / GND connected? SDA / SCL connected?) setup: CCS811 begin FAILED setup: hardware version: FFFFFFFF setup: bootloader version: FFFFFFFF setup: application version: FFFFFFFF setup: starting flash of 'CCS811_FW_App_v2-0-0.bin' in 5 seconds

I've tried everything, even signaling the pin on Wire, does anyone have any idea what to do?

maarten-pennings commented 3 years ago

Hi, the line

ccs811: ping failed (VDD / GND connected? SDA / SCL connected?)

is important. It is the very first time the library tries to communicate with the ccs811. The communication is the lightest possible, a ping. And that fails.

This means you have a hardware problem:

ccs811 is broken
the i2c block of your micro is broken
the data connection (sda and scl lines) is wrong (pullups?)
the power connection is wrong (vcc, gnd)
power mismatch (5v vs 3v3)
nwake is not grounded (simple setup)

Flashing a new firmware is useless, you first need to establish communication.

juka-lp commented 3 years ago

The pins are connected in the right place, one of the times I tried everything went right, but out of nowhere it went back to this error forever. I run an i2c scanner, and the i2c address appears, 0x16 is the most frequent