https://devzone.nordicsemi.com/f/nordic-q-a/6368/esb-on-nrf51822-with-32-byte-payloadI&#39;m working on a project where we&#39;re having mulitple nRF51822 chips communicate in a multiceiver way. When we bought the nRF51822 chips, the technical sales rep claimed that they could do ESB with up to 256 byte payloads. But looking into the Nordic n51en-USTelligent Community 13Mon, 06 Apr 2015 18:54:30 GMThttps://devzone.nordicsemi.com/thread/22184?ContentTypeID=1Mon, 06 Apr 2015 18:54:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:df32bdfb-f523-4c1b-b9aa-3bd6f097df64Daniel Veilleux<p>Hello Christopher,</p> <p>The 32-byte limitation in the official esb_arm.lib implementation is enforced in order to make the library backwards-compatible with older Nordic devices.</p> <p>If you are only using nRF51 devices then you can use larger payloads with the unofficial ESB library that is maintained by the support team: &quot;<a href="https://github.com/NordicSemiconductor/nrf51-micro-esb&quot;">github.com/.../nrf51-micro-esb&quot;</a>. See the UESB_CORE_MAX_PAYLOAD_LENGTH constant in micro_esb.h.</p><div style="clear:both;"></div>