Gazell data lag when more than 1 device is connected

[LT_Viktor]

Hi! I am fairly new to programming micro controllers so apologies if I ask many questions. I am using NRF52832. The situation is this - I have 2 devices and 1 host . After receiving data the host then sends data via UART to FT232RL and then to a computer. The devices are running on different pipes, however when both devices are sending data to the host some bytes are being skipped and there is this lagging as well - the data comes not consistently but in steps. Any ideas or advice ?

Here is the host's main code Host Device.txt

And here is the devices' code (it's quite a mess, sorry). Device.txt

[LT_Viktor]

Ok. I have managed to fix the byte skipping by using this answer. However, now I have data coming in little bursts at first and then it slows down gradually to a very slow rate... When I reset the host same thing happens again.

[ovrebekk]

Hi

Have you done some debugging to check how often the nrf_gzll_device_tx_failed(..) callback occurs?

As it is I don't think you are handling this interrupt correctly. You handle it by re sending the data_payload buffer, but at this point that buffer might already have been overwritten by new sensor data.

Secondly, you might want to check the return code from the nrf_gzll_add_packet_to_tx_fifo(..) calls, in case the internal buffers fill up. Once that happens the data will not be uploaded, and if you don't store it externally the packet will be lost.

Best regards