Posted at 2021-09-26 by Robin

Sun 2021.09.26

Hi @samux6146 a few questions.

Q1: Did you have Espruino running previously with code you had written? by chance recall the version?
Q2: Was an attempt made to flash the device?  re:boots in bootloader mode
Q3: Has an attempt been made to substitute cables, or re-seat unplug/replug the cable?
Q4: What PC OS?

Posted at 2021-09-26 by Samux6146

1)Yes i used it previously. What is a recall version?
2)yes attemp was made.
3)I have tried to solder a usb cable on the pcb.
4)Linux and mac os.

Posted at 2021-09-26 by Robin

Was attempting to determine which version was flashed.

Not super critical to know just yet, but as the board was just flashed, do you recall which version?

or, when the board does boot process.env

http://www.espruino.com/Reference#l_process_env

Attempting to determine if we have a separate flash issue or coding issue in addition to the soldering/use of additional port.

http://www.espruino.com/Pico

By chance are Tx and Rx reversed?
Is there a TTL converter such as CP2102?

Posted at 2021-09-26 by Samux6146

i am shure the os is not a problem becouse i have already used the espruino with this pc.

Attachments:

• photo_2021-09-26_20-07-45.jpg
  
• photo_2021-09-26_20-07-35.jpg

Posted at 2021-09-26 by Robin

So the cable is no longer soldered as in the photo?

Was an attempt to perform the advanced reflashing as it was thought the Pico was bricked?
Was SWD being done?
Solder bridge over BOOT0 on underside of board?
Were the battery contacts on the underside also soldered to?

http://www.espruino.com/Pico#advanced-reflashing

Is the desire to re-flash the device right now?

I agree, I just don't know what the commands or sequence are for port communications using Mac and weak using Linux. Others will have to provide that content.

Depending on how high that solder is on the USB tab contacts might raise one of the contacts high enough that it is no longer touching. Any chance solder wick is available to clean up those tab contacts so there is no residual solder?

Posted at 2021-09-26 by Samux6146

never used a battery, boot0 pads are not bridged, tried advanced reeflash but the usb is still not recognized, and i have removed the cable.

Posted at 2021-09-26 by @allObjects

@samux6146,

check the back of the part that is inserted into the USB socket. The contacts on the back - where you can solder on a socket - is covered with the white paint, the same one used to mark things on the board. Over time - and especially when you have tin leftovers on the USB contacts that make the board thicker and create more pressure - this paint wears off and exposed contacts short with the usb socket ground / finger springs that hold the plug/board in the socket. That could be the issue that Espruino Pico's signal are not coming thru anymore.

Posted at 2021-09-28 by @gfwilliams

You mention you're running under Linux. Do you see any new lines in dmesg when you plug it in?

Honestly, if it works in bootloader but not in normal mode, it could be firmware. Are you totally sure you've got an up to date firmware designed for a Pico on there? The bootloader won't stop you flashing (for instance) an Original Espruino firmware on there, in which case you'd see exactly this problem.