Delay between sending radio messages using ESB

RE: Delay between sending radio messages using ESB

Kenneth — Thu, 30 Nov 2023 20:56:16 GMT

I suggest to follow the intended flow of sending a packet and wait for irq, and ensure the correct event trigger and take appropriate steps (e.g on failed (flush + send new) and on sent (send new)).

Kenneth

RE: Delay between sending radio messages using ESB

tiler9 — Wed, 29 Nov 2023 12:33:27 GMT

Hello Kenneth, goood morning.

So,

[quote userid="2111" url="~/f/nordic-q-a/106096/delay-between-sending-radio-messages-using-esb/458039"]look at your implementation vs. the reference code[/quote]

I copied great part of sample ESB ptx code. Just changed to test if it gets any faster to transmit.

[quote userid="2111" url="~/f/nordic-q-a/106096/delay-between-sending-radio-messages-using-esb/458039"]are you sure you are using .noack intentionally?[/quote]

I just leaved it there to test but it is not doing anything because i'm using "config.selective_auto_ack = false" and the ESB library says that "When this feature is disabled, all packets will be acknowledged ignoring the noack field."

[quote userid="2111" url="~/f/nordic-q-a/106096/delay-between-sending-radio-messages-using-esb/458039"]You are clearing the ready flag in the event_handler()[/quote]

Yes, because now i evaluating the highest speed of transmission of the packet.

[quote userid="2111" url="~/f/nordic-q-a/106096/delay-between-sending-radio-messages-using-esb/458039"] if 1MBPS works[/quote]

It does works, but i had to increase the delay.

[quote userid="2111" url="~/f/nordic-q-a/106096/delay-between-sending-radio-messages-using-esb/458039"]100bytes instead of 252bytes[/quote]

It doens't.

[quote userid="2111" url="~/f/nordic-q-a/106096/delay-between-sending-radio-messages-using-esb/458039"]Are you sending any data in reverse direction here?[/quote]

No, i copied the code from ESB prx sample code, just changed the configuration of ESB to match with the TX board.

RE: Delay between sending radio messages using ESB

Kenneth — Wed, 29 Nov 2023 10:33:52 GMT

I think you will just have to take a step back and look at your implementation vs. the reference code also, for instance it does look that you are using .noack = true (meaning you do not want ack), are you sure you are using .noack intentionally? You are clearing the ready flag in the event_handler(), but you should ideally do this depending on the actual event, e.g. is it ESB_EVENT_TX_SUCCESS or ESB_EVENT_TX_FAILED. If it's *_FAILED, maybe you should consider resending the esb packet (not just sending the next etc). For test you can also check if 1MBPS works the same and whether using 100bytes instead of 252bytes makes any difference. Are you sending any data in reverse direction here?

Kenneth

RE: Delay between sending radio messages using ESB

tiler9 — Tue, 28 Nov 2023 14:18:42 GMT

Hi Kenneth, thanks for replying.

Unfortunately, this code that i posted is missing the "ready = true", at the end of the event_handler function. But the problem of the necessity of putting the delay after esb_write_payload(&tx_payload); persists

But i managed to reduce to 3ms delay, by putting the following configuration of ESB:

config.protocol = ESB_PROTOCOL_ESB;
config.payload_length = ESB_MAX_PAYLOAD_LENGTH;
config.bitrate = ESB_BITRATE_2MBPS;
config.event_handler = event_handler;
config.mode = ESB_MODE_PTX;
config.selective_auto_ack = false;
config.crc = ESB_CRC_16BIT;
config.use_fast_ramp_up = true;

RE: Delay between sending radio messages using ESB

Kenneth — Tue, 28 Nov 2023 13:48:44 GMT

Hello,

So I assume you have set CONFIG_ESB_MAX_PAYLOAD_LENGTH=252 here on both sides of the link.

I can't see where the ready flag is set to true?

Are you sure the problem is on the PTX and not the PRX?

Kenneth