Gammu on raspberry Zero - raspberry-pi

Question

I am trying to setup a raspberry zero to collect the temperature from a DS18B20 probe connected to a -20°C fridge of my lab. If a temperature above a certain value is detected, the raspberry should send an email to alert for a a problem. I use a chinese (IEASUN Technology) HSUPA modem with a Qualcom chip. Gammu is used to communicate with the modem. After installing gammu and my script, everything worked as expected. Then, I decided to add a function: upon sending a sms to the raspberry, I wanted that it sent back the temperatures of the connected probes (and I had to install gammu-smsd). This new function is working but my original alert script does not work anymore.
I must emphasise that this is done as an autodidact with minimal knowledge in coding (this will be obvious in the code).
Here are several key information.
When I run my 'Alert' script, now, I have this message:
Traceback (most recent call last):
File "sendsmstemp.py", line 11, in <module>
sm.Init()
gammu.ERR_DEVICEOPENERROR: {'Text': u'Error opening device. Unknown, busy or no permissions.', 'Code': 2, 'Where': 'Init'}
The code of my 'Alert' script is:
import gammu
import sys
# Create state machine object
sm = gammu.StateMachine()
# Read ~/.gammurc
sm.ReadConfig()
# Connect to phone
sm.Init()
import time
while 1:
        tempfile1 = open("/sys/bus/w1/devices/28-031689cf76ff/w1_slave")
        thetext1 = tempfile1.read()
        tempfile1.close()
        tempdata1 = thetext1.split("\n")[1].split(" ")[9]
        temperature1 = float(tempdata1[2:])
        temperature1 = temperature1 / 1000
if temperature1>-10:
     
message1 = {
'Text': 'Time is:' + time.strftime('%H:%M:%S')+'| Temperature Fridge 1 above -10°C!! . If still above the limit, another sms will be sent in 30min',
'SMSC': {'Location': 1},
'Number': '+Myphonenumber',
'Validity': 'Max',
}
sm.SendSMS(message)
#It waits 30min before sending another sms
time.sleep(1800)
Else:
#test the probe every min
time.sleep(60)
This code is launched at startup with this sh script:
#!/bin/sh
sleep 10
sudo python /home/pi/smstemp/sendsmstemp.py
The last script that I have added to this raspberry — which required the installation of gammu-smsd package — that has apparently broken the first one is:
#!/bin/sh
from=$SMS_1_NUMBER
message=$SMS_1_TEXT
#ThisHost=$(hostname)
# local file to write into
#FILE=$ThisHost"-status.txt"
# local directory to write to file and pick it for upload
#REPERTOIRE="/home/pi/sendsmstemp/"
#echo $REPERTOIRE$FILE
#Read last temperature 
temperature1=$(find /sys/bus/w1/devices/ -name "28-*6ff" -exec cat {}/w1_slave \; | grep "t=" | awk -F "t=" '{print $2/1000}')
#Send message
reply=""
echo "Temp Fridge 1: $temperature1" | sudo gammu sendsms TEXT "$from"
Now, my /etc/gammu-smsdrc config file looks like that:
[gammu]
device = /dev/ttyUSB0
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
gammucoding = utf8
[gammu1]
device = /dev/ttyUSB1
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
gammucoding = utf8
[gammu2]
device = /dev/ttyUSB2
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
gammucoding = utf8
[gammu3]
device = /dev/ttyUSB3
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
gammucoding = utf8
[smsd]
service = files
#logfile = syslog
logfile = /var/spool/gammu/log/gammu-smsdrc.log
# Change PIN code
pin = 1234
RunOnReceive = /home/pi/sendsmstemp/sendinfo.sh
My /etc/gammurc config file is the same (except that the last line is not included).
The gamma-detect command returns that:
[gammu]
device = /dev/ttyUSB0
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
[gammu1]
device = /dev/ttyUSB1
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
[gammu2]
device = /dev/ttyUSB2
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
[gammu3]
device = /dev/ttyUSB3
name = Phone on USB serial port Qualcomm__Incorporated Qualcomm_CDMA_Technologies_MSM
connection = at
The gammu --identify returns that:
Device : /dev/ttyUSB1
Manufacturer : Qualcomm
Model : unknown (+CGMM:HSPA MODEM)
Firmware : +CGMR:V1.1
IMEI : 356793034431627
SIM IMSI : +CIMI:208150010138412
The gammu getsecuritystatus returns that:
Nothing to enter.
And using this command works as expected (it send a sms):
gammu sendsms TEXT 06xxxxxxxx -text "Test"
Why my 'Alert' script is not running??? I am lost.
Many many thanks for your help!!

Answer 1

As explained in my comment to my question, I gave up. I have amended and debugged the alert script, for those that might be interested (it works with 2 probes and it is easy to add other probes):
#!/usr/bin/env python
# encoding: utf-8
import gammu
import sys
# Create state machine object
sm = gammu.StateMachine()
# Read ~/.gammurc
sm.ReadConfig()
# Connect to phone
sm.Init()
import time
while 1:
    tempfile1 = open('/sys/bus/w1/devices/28-031689cf76ff/w1_slave')
    tempfile2 = open('/sys/bus/w1/devices/28-051691e603ff/w1_slave')
    thetext1 = tempfile1.read()
    thetext2 = tempfile2.read()
    tempfile1.close()
    tempfile2.close()
    tempdata1 = thetext1.split("\n")[1].split(" ")[9]
    tempdata2 = thetext2.split("\n")[1].split(" ")[9]
    temperature1 = float(tempdata1[2:])
    temperature2 = float(tempdata2[2:])
    temperature1 = temperature1 / 1000
    temperature2 = temperature2 / 1000
    if int(temperature1) > -10 or int(temperature2) > -10:
        #Tony
        message = {
        'Text': time.strftime('%H:%M') + '\r\nTemperature of a Team 1 Fridge above -10deg' + '\r\nFridge 1=' + str(temperature1) + 'deg\r\nFridge 2=' + str(temperature2) + 'deg\r\nIf still above the limit, another SMS will be sent in 30 min',
        'SMSC': {'Location': 1},
        'Number': '+336XXXXXXXXX',
        'Validity': 'Max',
        }
        sm.SendSMS(message)
        time.sleep(1800)
        #Check every min
        time.sleep(60)