OTA DFU speed

RE: OTA DFU speed

Vidar Berg — Tue, 16 Feb 2016 14:13:17 GMT

I'm unable to reproduce your setup here. Please try to do this via MCP. You can always re-install MCP if you break the script, or better, just do a backup of the scripts that you do modify.

RE: OTA DFU speed

Sergy — Mon, 15 Feb 2016 16:22:20 GMT

its using the right script, because if i make a mistake on purpose and break the script it doesnt work:)

here is my command line:

"c:\Program Files (x86)\IronPython 2.7\ipy.exe" main.py --file c:\Keil_v5\OTA_NOBL.zip --address f1b472ce7137

Im wondering if the screen printout slows down the progress may be?

RE: OTA DFU speed

Vidar Berg — Mon, 15 Feb 2016 16:19:10 GMT

Is it possible that it's not invoking the correct dfu_transport_ble.py script? Sounds like the change you did is not being applied.

Can you share the command line arguments so I can try the same here?

RE: OTA DFU speed

Sergy — Mon, 15 Feb 2016 16:15:02 GMT

indeed im using mcp 3.10, but i dont use application itself, just doing it from command line with python script.

RE: OTA DFU speed

Vidar Berg — Mon, 15 Feb 2016 16:12:52 GMT

Tested the above changes and realized that the suggested connection interval will be too short when packet receipt notification is disabled (scheduling of flash store fails). It needs to be at least 20 ms on 51. However, by disabling the packet receipt notification I was able to upload s110 v.8.0.0 (87KB) in ~15 seconds.

Are you using MCP v.3.10? Also, did you try to restart MCP after you did the change?

RE: OTA DFU speed

Sergy — Mon, 15 Feb 2016 15:15:55 GMT

doesnt seem to help im afraid...

RE: OTA DFU speed

Vidar Berg — Mon, 15 Feb 2016 10:35:56 GMT

Assuming master control panel version 3.10.0 you can do the following changes to the DFU script to increase overall throughput:

Step 1. Reduce connection interval:

Open "\Master Control Panel\3.10.0.14\lib\dfu\master_emulator.py", go to line ~237 and replace the following code snippet:

        conn_params.ConnectionIntervalMs = 15
        if self.master.Connect(self.myPeerDevice.DeviceAddress):

with

        conn_params.ConnectionIntervalMs = 11.25
        if self.master.Connect(self.myPeerDevice.DeviceAddress,conn_params):

Step 2. Disable packet receipt notification:

Open "\Master Control Panel\3.10.0.14\lib\nordicsemi\dfu\dfu_transport_ble.py", go to line ~109 and change the packet number from '10' to '0'.

If I remember correctly this should take about 10-15 seconds to upload the image with the above changes.

RE: OTA DFU speed

Sergy — Mon, 15 Feb 2016 10:10:19 GMT

yup, using PC with BT dongle

RE: OTA DFU speed

Vidar Berg — Mon, 15 Feb 2016 08:28:52 GMT

Are you using the PC version of master control panel to do the upload?