https://devzone.nordicsemi.com/f/nordic-q-a/11044/nrf51822-low-tx-rate-bluefruit-le-spi-friendDear all, I do have troubles with the bandwidth of the nRF51822 contained in the Adafruit&#39;s Bluefruit LE SPI Friend module. The max. throughput I get is 213 B/s. I&#39;m using Nordis&#39;s UART characteristics. I use the Adafruit&#39;s firmware and library. en-USTelligent Community 13Mon, 04 Jan 2016 14:15:23 GMThttps://devzone.nordicsemi.com/thread/41282?ContentTypeID=1Mon, 04 Jan 2016 14:15:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e28cc724-060e-4f01-89a4-99554b074a30Petter Myhre<p>What connection interval are you using? How much data in each packet? Do you have any sniffer available so we can so what is sent on the air?</p><div style="clear:both;"></div>