Python3 code is below…
also available at this Gitlab link
https://gitlab.com/Alex-rtnVFRmedia/pagertest2
Control the Arduino pager TX via Python running on a Linux machine
# control the Arduino RF22 pager TX
# modified ON1ARF code
#
# 2017-06-23 Alex The Engineer
# The Rat's Nest, Ipswich UK
#
#
import serial
import pprint
import sys
from colorconsole import terminal
from colored import fg, bg, attr
import readline
# global colours
res=attr('reset')
# tty open now coded as a function
#
# colored module used here instead of colorconsole/screen object
# just in case there isn't a global screen object available
#
def page(ttydev,capcode,function,repeats,message):
#
# create msg bytearray (NB: there should be more error
# checking here
#
msg=(b'P ')
msg+=(b'%07d' % capcode)+(b' ')
msg+=(b'%01d' % function)+(b' ')
msg+=(b'%01d' % repeats)+(b' ')
msg+=(message)+(b'\r')
print (fg(80),bg(0x12),'** opening tty:',ttydev+res)
# serial port open with error checking this time
try:
ser = serial.Serial(ttydev, timeout=3)
except serial.SerialException:
print(res)
sys.exit("** ERROR: cannot open tty\n\n")
# if we got here everything is OK
# RTS/DTR does not actually need to be flipped
# as opening the tty does that anyway
# which saves some time starting up the arduino comms
# ser.setRTS(True)
# ser.setRTS(False)
#
# get the lines from the buffer
print (fg(0x0b),bg(0x15),'** tty open OK: >>check TX<<'+res)
ibuf = ser.readlines()
print (fg(202))
#pprint.pprint(ibuf)
print (' ibuf[0] :',ibuf[0])
print (' ibuf[-1] :',ibuf[-1])
# check to see what came down comms line is expected
if ibuf[0] != (b'RF22 init OK\r\n'):
print(res)
sys.exit("** ERROR: RF22 init error\n\n")
if ibuf[-1] != (b'F <freqmhz> <freq100Hz>\r\n'):
print(res)
sys.exit("** ERROR: RF22 comms error\n\n")
# if TX has correctly initialised now send message
ser.write(msg)
# get a line back from TTY, it should be exactly same as msg
# but with a \n after it
# if it hasn't something has gone wrong
check=ser.readline()
print(fg(0x50),'<< from tty:',fg(0x72),bg(0x08),check,res,fg(0x52))
if check != (msg+b'\n'):
print(res)
sys.exit("** ERROR: pager comms error\n\n")
print (' ++ comms to pager TX OK ++')
# get data returned over comms link
# and now echo it with some pretty colours 🙂
colindex=0x70
while True:
data=ser.readline()
# only print it if a sending confirmation
if data==(b'POCSAG SEND\r\n'):
print (fg(0x30),'<< from tty:',fg(colindex),data)
colindex += 1
if data==(b'F <freqmhz> <freq100Hz>\r\n'):
break
# all done, close tty
print (fg(0x28),'** message sent correctly **\n')
ser.close()
def header(scr):
scr = terminal.get_terminal(conEmu=False)
scr.clear()
scr.xterm256_set_fg_color(0x52)
scr.xterm256_set_bk_color(0x08)
scr.print_at(2,0,"rtn telecom : pagertest 1.00")
scr.xterm256_set_bk_color(0)
scr.gotoXY(2,3)
scr.xterm256_set_fg_color(0x20)
print('capcode:')
scr.xterm256_set_bk_color(0x08)
scr.xterm256_set_fg_color(0x78)
scr.gotoXY(10,3)
print(' ')
scr.xterm256_set_bk_color(0)
scr.gotoXY(20,3)
scr.xterm256_set_fg_color(0x20)
print('alert:')
scr.xterm256_set_bk_color(0x08)
scr.xterm256_set_fg_color(0x78)
scr.gotoXY(26,3)
print(' ')
scr.xterm256_set_bk_color(0)
scr.gotoXY(2,5)
scr.xterm256_set_fg_color(0x20)
print('message:')
scr.xterm256_set_bk_color(0x08)
scr.xterm256_set_fg_color(0x78)
scr.gotoXY(10,5)
print(' ')
scr.xterm256_set_bk_color(0)
scr.gotoXY(0,9)
scr.xterm256_set_fg_color(0x28)
# to be developed, input capcode
def get_capcode(scr,default):
pass
# display capcode in input box
def disp_capcode(scr,capcode):
scr.xterm256_set_bk_color(0x08)
scr.xterm256_set_fg_color(0x78)
scr.gotoXY(10,3)
print (str((b'%07d' % capcode),'utf-8'))
scr.xterm256_set_bk_color(0)
# display alert code in input box
def disp_alert(scr,alert):
scr.xterm256_set_bk_color(0x08)
scr.xterm256_set_fg_color(0x78)
scr.gotoXY(26,3)
print (str((b'%01d' % alert),'utf-8'))
scr.xterm256_set_bk_color(0)
# display message in input box
def disp_msg(scr,message):
scr.xterm256_set_bk_color(0x08)
scr.xterm256_set_fg_color(0x78)
scr.gotoXY(10,5)
print (str(message,'utf-8'))
scr.xterm256_set_bk_color(0)
scr.gotoXY(0,9)
#
# main code now starts here
#
# initialise the screen
#
# 2017-06-23: now accepts interactive input of message
#
# a blank line transmits the hardcoded message
#
# 'q' exits the code
#
while True:
# refresh the header
screen = terminal.get_terminal(conEmu=False)
header(screen)
# message now split into capcode, function (0-3), repeats
# and 40 character bytearray
#
# hardcoded values
#
capcode = 20008
function = 2
repeats = 1
message = b'rtn: miauw naar de maan!<<<pagertest>>>'
ttydev="/dev/ttyACM0"
# display the capcode and alert that are currently hardcoded
# but leave the msg box blank as it now accepts user input
#
disp_capcode(screen,capcode)
disp_alert(screen,function)
#
# create a quick and dirty coloured prompt for the input
#
screen.gotoXY(2,7)
screen.xterm256_set_fg_color(0x38)
print('------>')
screen.gotoXY(10,7)
screen.xterm256_set_fg_color(0x68)
#
# this uses readline so has some basic editing functions
#
# anything over 40 character is clipped
#
ms1=input()
if ms1 !='':
message=ms1[0:40].encode('utf-8')
if ms1 =='q':
break
#
# display the msg in the top box and transmit it
#
disp_msg(screen,message)
page(ttydev,capcode,function,repeats,message)
#
# terminate script and reset all the console colours
#
print (fg(0xc8),'\n++ Script completed sucessfully ++\n',res)
