BC26 module cannot upload @ win VScode

[D-zz]

Board： BC26-TE-B

Configuring upload protocol... Looking for upload port... Use manually specified: COM3 Uploading: program Waiting module for POWER-ON or RESET <===========================> DONE Starting <======== ERROR: EPP Answer *** [upload] Explicit exit, status 2

[Wiz-IO]

more info? module firmware? platform version?

[D-zz]

@Wiz-IO Thank you very much. More info as below：

[Wiz-IO]

try edit this value https://github.com/Wiz-IO/platform-quectel/blob/master/builder/frameworks/MT2625.py#L193

[Wiz-IO]

or enable DEBUG https://github.com/Wiz-IO/platform-quectel/blob/master/builder/frameworks/MT2625.py#L61

[D-zz]

My board is BC26-TE-B，it is same of BC66-TE-B？

[Wiz-IO]

but maybe chip-set ID is other

[Wiz-IO]

are you update BC26 with BC66 firmware?

[D-zz]

@Wiz-IO Yes ，i update BC26 with BC66 firmware

[D-zz]

what's the error of “EPP Answer” means ?

[D-zz]

when i use BC26, is same problem of use BC66

[Wiz-IO]

“EPP Answer” means: no answer from first bootloader

[maximevince]

If anyone is still wondering, I ran into the same issue, and it can be solved as follows:

• the BC66 needs some more time after booting, before receiving the expected EPP reply. (Almost 500us)

This can be seen in the capture below:

It can be solved by modifying ~/.platformio/platforms/quectel/builder/frameworks/MT2625.py by adding time.sleep(0.5) or similar to line 384:

diff --git a/builder/frameworks/MT2625.py b/builder/frameworks/MT2625.py
index e9215ac..898a8cc 100644
--- a/builder/frameworks/MT2625.py
+++ b/builder/frameworks/MT2625.py
@@ -381,6 +381,8 @@ class MT2625:
             self.s.write(data[:1024])                        
             data = data[1024:]  
             PB_STEP()   
+        # Give the chip some time
+        time.sleep(0.5)
         ASSERT( self.cmd("", 10) == b"\x1D\x3D\0\0\0\0\0\0\0\0", "EPP Answer" ) 
         self.uart_speed_max()           
         # DA_2

[Wiz-IO]

Thanks @maximevince

[maximevince]

Thanks @Wiz-IO for your platformio framework. I got a custom application running on a BC66 in no time. Awesome!