ESP32 Forum

So, it is recommended that sending the next ESP-NOW data after the sending callback function of previous sending has returned.

esp_now_send

esp_now_send

kython wrote: ↑

Wed Feb 20, 2019 5:25 pm

I have 2 ESP32s talking using ESPNOW. I started running into send errors by trying to send data to quickly. I started following the advice in your documentation to wait for the send cb to be called before sending the next packet.

So, it is recommended that sending the next ESP-NOW data after the sending callback function of previous sending has returned.

Occasionally the send cb is not being called which causes a lockup. I can mitigate this problem with a timeout if need be but it seems as though the call back should be called.

Code: Select all

esp_now_send

is being called from more than one task.

Is

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esp_now_send

thread/task safe?
Is there a known scenario that would cause the send cb to not be called?