Updating DFU via RS-485 and UART without python on nRF52840 DK

RE: Updating DFU via RS-485 and UART without python on nRF52840 DK

bjorn-spockeli — Tue, 02 Oct 2018 08:10:10 GMT

Q1: The nRF52840 with the S140 SoftDevice can be a BLE Central. But the issue here is transferring the firmware image from the Android tablet to the nRF52840, not from the 52840 to the other devices in the mesh.

Q2: Yes, if you use the python code from our nrfutil implementation as a reference and convert that to Java, so that the .zip packet is parsed correctly and send via UART. Not sure if dfu_transport_mesh.py is the only source you will have to migrate from python to java.

RE: Updating DFU via RS-485 and UART without python on nRF52840 DK

Tomi — Mon, 01 Oct 2018 14:40:44 GMT

1. But first nRF52840 DK can't work as Ble Central / Serial Master device and others as "slave" maybe?

2. Would if work if I convert dfu_transport_mesh.py(if that is only thing needed?) into Java to create DFU mesh packet and send if via UART like nrfutil does? (which will block serial port for 30+minutes)

RE: Updating DFU via RS-485 and UART without python on nRF52840 DK

bjorn-spockeli — Mon, 01 Oct 2018 14:21:16 GMT

I am afraid that we do not have any Java or C implementation of nrfutil. There is also no mechanism for the nRF device to initiate a DFU update, this is done by the Ble Central/ Serial Master device.

So in order to make this work you will have to create some code that reads the hex file and sends it over UART in the same format as nrfutil does.

Best regards

Bjørn