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Showing posts from August, 2017

Sync with remote as you code

If your like me, sometimes you can not test the code your writing on your workstation and the code need to be 'installed' or 'deployed' to a remote server in order to test it because of hardware constrain or physical environment (IO, network,...).

The following is a simple shell script that will monitor a local path and rsync it to a remote server when a file is changed. It can also remote execute some commands (like restarting services for example).

#!/bin/sh

if [ -z ${1} ] || [ -z ${2} ] || [ -z ${3} ] || [ -z ${4} ]; then
cat <<EOF
Usage:
  remote_sync local_path remote_user remote_server remote_path [remote_script]

local_path:    Local path from where the files will be copied from (required)
remote_user:   Remote user to use for rsync  (required)
remote_server: Remote server (IP of FQDN)  (required)
remote_path:   Remote path where the files will be copied to  (required)
remote_script: Remote script to execute after syncing the files (optional)
              Script mus…

Arduino: Upload timeout and !!! in a string

If you ever see the following when uploading your sketch to an Arduino board (using the Arduino IDE, PlatformIO or any other):

avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer

Look for !!! (3 exclamation points characters  aka bang) in your code and remove them.

Why ? These 3 exclamation point characters are actually used to tell the Arduino bootloader to…