ESB_EVENT_TX_FAILED trigger

[DimaG]

Which problems can cause ESB_EVENT_TX_FAILED event? How does the s/w know that the sending has failed? It is just a sending problem indicator or there is any information coming from the receiver as well?

[Joakim Jakobsen]

Hi. 

I'll check with one of our engineers with more experience with ESB. 

Could you share what version of the SDK you are working with?

Br,
Joakim

[DimaG]

We use version SDK version 1.9.1. 

[Joakim Jakobsen]

Hi again. 

Which problems can cause ESB_EVENT_TX_FAILED event

ESB_EVENT_TX_FAILED is and event that is triggered on TX failure.

I.e:
When you are sending a message and the radio times out waiting for the acknowledgement this will trigger the ESB_EVENT_TX_FAILED event.

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_esb.html#setting-up-an-esb-application 

Br, 
Joakim

[DimaG]

Which acknowledgement ? From the sender or the receiver? 

[Joakim Jakobsen]

It's explained in the link I sent you. 

• If the node is a PTX:

  1. Add packets to the TX FIFO by calling esb_write_payload().

  2. Depending on the value of esb_config.tx_mode that was used in the most recent call to esb_init(), you might have to call esb_start_tx() to start the transmission.

  3. After the radio has received an acknowledgment or timed out, handle ESB_EVENT_TX_SUCCESS, ESB_EVENT_TX_FAILED, and ESB_EVENT_RX_RECEIVED events.