Introduction

Some times we may need to interactive with the Arduino remotly, for example, check some pins input and then change the output or behaviour accordingly. The Dragino MS12 provide an easy way to finish such work. The key software we use for this are:

• minicom : Terminal Emulator running in OpenWrt
• Bitlash : An open source interpreted language shell and embedded programming environment.

Example with Bitlashdemo

1/ Upload the Bitlashdemo on Arduino according to the instruction.

2/ Connect to connect the Arduino and the MS12 via UART.

3/ Install minicom in Dragino, make sure your Dragino connect to the internet , then run:

root@dragino:~# opkg update             // update latest available package from OpenWrt
root@dragino:~# opkg install minicom  // install minicom. 

then configure minicom by modifing the file /etc/minirc.dfl as below:

root@dragino:~# cat /etc/minirc.dfl
# Machine-generated file - use "minicom -s" to change parameters.
pu port             /dev/ttyS0
pu baudrate         57600
pu bits             8
pu parity           N
pu stopbits         1
pu rtscts           No

4/ run

minicom 

then you will able to use bitlash shell to interactive with Arduino.

Welcome to minicom 2.3
OPTIONS:
Compiled on May 28 2011, 04:01:38.
Port /dev/ttyS0
              Press CTRL-A Z for help on special keys
> AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0
------^
unexpected number
> print "hello"
hello
> print 2+2
4
>