@cepics I ended up using the tab off a pop can (paper wasn't thick enough), but it works! I'm now thinking it must be the pins not fully making connection with the Atom. If I twist it just slightly to the right, everything connects again.

As for the code, that's on GitHub.

@cepics Figured it out. If I press really hard on the Atom toward the top of the controller, suddenly everything works. I have to keep a lot of pressure on it, thus the clamp. Looks ridiculous, but now everything works 100%. Super annoying, and I might contact support to see if they have any permanent suggestions since, I just got this in the mail a week ago, but I have a potential solution for you.

@cepics My batteries always read 65.5V regardless of their charge status. I'm glad you're getting at least partial control. My controller seems entirely unresponsive other than the S3's button.

@cepics I've recently been experiencing this exact behavior. From all the debugging I've done, I've determined it has to be the controller. I've tried all the firmwares I can find for the AtomS3, but it seems to be working. It's just that it can't communicate with the controller itself.

Serial output shows i2c device discover all over the place. This is driving me crazy. The drone is unusable until I get this fixed.

Scanning... Wire1
No I2C devices found

Version 1
E (287) esp_core_dump_flash: No core dump partition found!
M5AtomS3 initializing...OK
3,CC,8D,A2,21,A6,F8
ESPNow Init Success
Scanning... Wire1
I2C device found at address 0x78  !
I2C device found at address 0x7C  !
done

Version 1
E (287) esp_core_dump_flash: No core dump partition found!
M5AtomS3 initializing...OK
3,CC,8D,A2,21,A6,F8
ESPNow Init Success
Scanning... Wire1
No I2C devices found

Version 1
E (287) esp_core_dump_flash: No core dump partition found!
M5AtomS3 initializing...OK
3,CC,8D,A2,21,A6,F8
ESPNow Init Success
Scanning... Wire1
I2C device found at address 0x6E  !
done

Version 1
E (287) esp_core_dump_flash: No core dump partition found!
M5AtomS3 initializing...OK
3,CC,8D,A2,21,A6,F8
ESPNow Init Success
Scanning... Wire1
I2C device found at address 0x4E  !
I2C device found at address 0x4F  !
I2C device found at address 0x51  !
I2C device found at address 0x55  !
I2C device found at address 0x57  !
I2C device found at address 0x58  !
I2C device found at address 0x5B  !
I2C device found at address 0x5C  !
I2C device found at address 0x5D  !
I2C device found at address 0x61  !
I2C device found at address 0x62  !
I2C device found at address 0x66  !
I2C device found at address 0x6C  !
I2C device found at address 0x6D  !
I2C device found at address 0x6F  !
done

Version 1
E (287) esp_core_dump_flash: No core dump partition found!
M5AtomS3 initializing...OK
3,CC,8D,A2,21,A6,F8
ESPNow Init Success
Scanning... Wire1
I2C device found at address 0x6F  !
I2C device found at address 0x71  !
I2C device found at address 0x72  !
I2C device found at address 0x74  !
I2C device found at address 0x75  !
I2C device found at address 0x78  !
I2C device found at address 0x7A  !
I2C device found at address 0x7E  !
done

Version 1
E (287) esp_core_dump_flash: No core dump partition found!
M5AtomS3 initializing...OK
3,CC,8D,A2,21,A6,F8
ESPNow Init Success
Scanning... Wire1
I2C device found at address 0x19  !
done

Version 1