i trying send text using a-gsm shield raspberry pi 3. using sample python code came gsm attempt send text , receiving following error:
think problem has "read = bytearray()" on line 444 in /usr/lib/python2.7/dist-packages/serial/serialposix.py. reason, "read" not return value when printed after calling bytearray().
following copy of python code using send text message.
please me understand why bytearray() returning empty string.
code: select all
^ctraceback (most recent call last): file "./sendsms.py", line 96, in <module> res = sendsms(destinationnumber, "129", message)#domestic format numbers file "/home/wvandiver/gsm/rpi_examples/a-gsm-rpi-examples-py-library-based-v1_ 2/agsm_sms_lib.py", line 36, in sendsms res = recuartdata(">","error",12) file "/home/wvandiver/gsm/rpi_examples/a-gsm-rpi-examples-py-library-based-v1_ 2/agsm_serial_lib.py", line 88, in recuartdata dt = agsm.read(tm) file "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 447, in re ad ready,_,_ = select.select([self.fd],[],[], self._timeout)code: select all
# select based implementation, proved work on many systems def read(self, size=1): """read size bytes serial port. if timeout set may return less characters requested. no timeout block until requested number of bytes read.""" if not self._isopen: raise portnotopenerror read = bytearray() print "loosing @ bytearray: ",read #read empty string while len(read) < size: ready,_,_ = select.select([self.fd],[],[], self._timeout) # if select used timeout, , timeout occurs, # returns empty lists -> abort read operation. # timeout == 0 (non-blocking operation) abort when there # nothing read. if not ready: break # timeout buf = os.read(self.fd, size-len(read)) # read should return data select reported # ready read when point. if not buf: # disconnected devices, @ least on linux, show # behavior ready read # reading returns nothing. raise serialexception('device reports readiness read returned no data (device disconnected?)') read.extend(buf) return bytes(read)code: select all
############################################################################################################################################ #a-gsm-send-sms.py v1.01/13 june 2016 - a-gsm 2.064 send sms utility / demo #copyright (c) 2016 dragos iosub / r&d software solutions srl # #you legaly entitled use software in conjunction a-gsm devices usage. modifications, derivates , redistribution #of software must include unmodified copyright notice. can redistribute software and/or modify under terms #of copyright notice. other usage may permited after written notice of dragos iosub / r&d software solutions srl. # #this software distributed provide "as is" in hope useful, without warranty; without implied #warranty of merchantability or fitness particular purpose. # #dragos iosub, bucharest 2016. #http://itbrainpower.net ############################################################################################################################################ #health , safety warning!!!!!!!!!!!!!!!!!!!! #high power audio (around 700mw rms)! can damage years! use care when headset connected. #we recomend use at+clvl=20 (as maximum value), audio setup command in order limit output power. # # warning: wiring a-gsm-gsm board u-controllers/boards(rpi) must made boards unpowered!! # # legal disclaimer: # incorrect or faulty wiring and/or connection can damage rpi and/or a-gsm board! # following directives provided "as is" in hope useful, without warranty! # wiring on own risk! # # references: # http://itbrainpower.net/a-gsm/images/raspberypi_a-gsm_shield-wiring.png # http://itbrainpower.net/a-gsm/downloadables/a-gsm_kickstart_v_0-90.pdf # http://itbrainpower.net/a-gsm/gsm-shield-arduino-raspberrypi-features-code-examples.php # http://itbrainpower.net/a-gsm/gsm-shield-arduino-raspberrypi-projects.php ############################################################################################################################################ # utility must runned root (just use: sudo python yourpythonfilename.py) message="hi!\r\nthis message has been sent a-gsm v2.064 shield connected rpi board." destinationnumber="1234567890" #usually phone number international prefix eg. +40 romania - in networks must use domestic numbers usepoweringcontrol = 1 #change 0 if not want control powerup/powerdown a-gsm board. in case, please sure a-gsm board powered up(..see a-gsm_kickstart_v_x-yz.pdf) before run utility #do not change under following line! insteed make 1 copy of file , play with! #hint: if make changes of code, before run run clear utility (erase python compiled *.pyc files)... ###erase .pyc files `find . -name '*.pyc' -delete` ############################################################################################################################################ import os import serial time import sleep, time string import replace globalparvar import * agsm2_064_hw_control import * agsm_serial_lib import * agsm_basic_lib import * agsm_sms_lib import * print "light example - send sms destination number" sleep(1) if not os.getuid() == 0: print("please use root privileges! try: \"sudo python yourpythonfilename.py\"") exit(0) if destinationnumber=="": print("no destination number has been set sms!") print("edit file , set destinationnumber in line 35\r\n") exit(0) # set serial/usb communication section start # bellow chose value bw [ser] serial /dev/ttyama0 or [usb] /dev/ttyusb0 # if module usb port maps other port /dev/ttyusb1, edit modulename_serial_lib.py... serialcommunicationvia = serialcon # override default value loaded globalparvar.py. here use via serial communication setserialcom(serialcommunicationvia) # set current communication option startserialcom() # open serial communication bw. rpi , a-gsm shield # set serial/usb communication section end # set hardware control setup & power on section start if usepoweringcontrol==1: hwcontrolsetup() # setup rpi i/o ports sleep(2)#some delay... if usepoweringcontrol==1: poweron() sleep(1) # set hardware control setup & power on section end # set modem startup setup section start setupmodem() # set modem startup setup section end # main program section start print "try send sms...." #check @ command pdf proper 129/145 parameter/number format usage res = sendsms(destinationnumber, "129", message)#domestic format numbers #res = sendsms(destinationnumber, "145", message)#international format numbers if res==0: print "sms has been sent succes" # main program section end # stop serial communication section start stopserialcom() # close modem communication # stop serial communication section end # hardware control release & power off section start if usepoweringcontrol==1: poweroff() #shutdown modem if usepoweringcontrol==1: hwcontrolrelease() # free gpio # hardware control release & power off section end print("\r\n\r\nthat's folks!\r\n")
solved
there discrepancy wiring schematic in sample code http://itbrainpower.net/a-gsm/raspberry ... code-a-gsm , wiring schematic manufacturer http://itbrainpower.net/a-gsm/images/ra ... wiring.png.
a-gsm d2 goes pin 10 of rpi
a-gsm d3 goes pin 8 of rpi
a-gsm d4 should not used standard setup of rpi
once wires switched , tutorial viewtopic.php?f=28&t=165897&p=1069504#p1069504 followed, able send text.
there discrepancy wiring schematic in sample code http://itbrainpower.net/a-gsm/raspberry ... code-a-gsm , wiring schematic manufacturer http://itbrainpower.net/a-gsm/images/ra ... wiring.png.
#name rpi a-gsm shield
#
#power a-gsm 16 d7 - power(up/down)
#reset a-gsm 18 d6 - reset
#a-gsm status 12 d5 - status
#
#serial txd0 08 d4 - tx(rxd)
#serial rxd0 10 d3 - rx(txd)
#
#5v 02/04 5v - on arduino power in connector
#gnd 06/14 gnd - on arduino power in connector
a-gsm d2 goes pin 10 of rpi
a-gsm d3 goes pin 8 of rpi
a-gsm d4 should not used standard setup of rpi
once wires switched , tutorial viewtopic.php?f=28&t=165897&p=1069504#p1069504 followed, able send text.
raspberrypi
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