two sets of nRF52840 device Firmware upgrade without phone or tablet

[jordanliu25]

We have a question about firmware upgrade during our development based on nRF52840. I understand that there are couple ways to upgrade the firmware by phone/tablet/PC. However, we would like to make this happen - Using one nRF52840 device to upgrade the firmware for another nRF52840. Let's me define the first nRF52840 as "Host". When the Host has a new fireware, it will transfer the new firmware to another nRF52840 through Bluetooth. After it receives the whole firmware, it will upgrade. The whole process is similar to the IoT fireware upgrade. Can you help to review if you have some suggestions how to make it happen? Any suggestions are welcome. Thanks

[twihtronics]

Is the host connected to a pc or standalone? This will be important to know for the host side. FOr the side receiving the update in the sdk under DFU, those examples should give you the functionality your desire as is for the device being updated.

[twihtronics]

nRF Connect is also a good start for the host side. 

[Marjeris Romero]

Hi,

Could you explain you application a little bit more? Do you need to update only 2 devices or do you have have multiple devices to update? Can I ask why you want a device A to update device B? Why not use the phone (or the DFU master) to update both devices?

-Marjeris

[jordanliu25]

The host is standalone. It doesn't connect to a pc. Do you have any ideas how to make make the connection between host and receiver when upgrading the system? Receiver side may refer to the sdk examples.

[jordanliu25]

I would like to ask one host to upgrade multiple devices. Because our using environment request this function.