Bluetooth not compatible with ESP-NOW + WiFi

[nseidle]

No good deed goes unpunished. Because of this issue, WiFi.setSleep(false) was added. Once Bluetooth is turned on, we get the following error reported by the ESP32 core IDF:

E (18293) wifi:Error! Should enable WiFi modem sleep when both WiFi and Bluetooth are enabled!!!!!!

I have never seen so many exclamation points.

This occurs when Bluetooth SPP+BLE mode, SPP mode, or BLE mode is running and ESP-NOW is started.

Coexistence doesn't seem to be an issue: WiFi (including ESP-NOW) + BT SPP/BLE is supported in Station mode.

So if Bluetooth is on, and WiFi is on, we can't use WiFi.setSleep(false). Possible solution is to run WiFi in WIFI_AP_STA mode, but this did not fix the issue.

For now, it looks like we need to prevent ESP-NOW and WiFi from running at the same time.

[nseidle]

Active Bluetooth BLE + ESP-NOW + WiFi is testing well with setSleep removed. Bluetooth SPP + ESP-NOW is not mentioned as being supported.

 ESP-NOW can work with Wi-Fi and Bluetooth LE, and supports the ESP8266, ESP32, ESP32-S and ESP32-C series of SoCs. It’s widely used in smart-home appliances, remote controlling, sensors, etc.

[nseidle]

This is in v1.0.