S103-G use GSM/GPRS module to connect to internet
roberts_lando last edited by
Thanks @tomas_hora I did it now! If you want I can make a full tutorial about this topic
roberts_lando last edited by tomas_hora
TUTORIAL FIBOCOM G510 Unipi Neuron S103-G
Make the file-system writable:
mount / -o remount,rw mount /boot -o remount,rw
Test the interface /dev/ttyAMA0 (serial link parameters: 115 200 1N8 Bps/Par/Bits)
- Export pin 18
echo 18 >/sys/class/gpio/export
- Switch on module
echo out > /sys/class/gpio/gpio18/direction echo 1 > /sys/class/gpio/gpio18/value echo 0 > /sys/class/gpio/gpio18/value sleep 1 echo 1 > /sys/class/gpio/gpio18/value sleep 2
- Start the communication using
apt-get install cu chown root:root /dev/ttyAMA0 cu -l /dev/ttyAMA0
- Test: send sms (<Enter> means you have to press enter, OK is the output of the command)
AT <Enter> OK AT+CMGF=1 <Enter> OK AT+CMGS="yourphonenumber" <Enter> > Prova <Ctrl+z> +CMGS: 152 OK
- Disconnect: type
~(alt+126) than wait for
[unipi]output than type
If interface doesn't works try:
- Enable UART:
nano /boot/cmdline.txtadd (if not present) or edit this line:
enable_uart=1. Close and save the file by typing
Y. Reboot Unipi Neuron and retry to test the interface.
Now let's configure the interface for internet connection
- Install required packages
apt-get update apt-get install ppp screen elinks
- Edit the configuration file (I use nano
apt-get install nano)
cd /etc/ppp/peers/ nano rnet
- Copy the code below to the new file
#configure for connection connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs -T <yourAPNhere>" # Use /dev/ttyAMA0 as the communication port: /dev/ttyAMA0 # Baudrate 9600 # Assumes that your IP address is allocated dynamically by the ISP. noipdefault # Try to get the name server addresses from the ISP. usepeerdns # Use this connection as the default route to the internet. defaultroute # Makes PPPD "dial again" when the connection is lost. persist # Do not ask the remote to authenticate. noauth # No hardware flow control on the serial link with GSM Modem nocrtscts # No modem control lines with GSM Modem local
<yourAPNhere>with your APN (Search in google APN of "your mobile operator") close and save the file by typing
If your SIM card has a PIN edit this file
nano /etc/chatscripts/gprsun comment the line
AT+CPIN=1234and set the pin instead of
Enable the connection by typing
pon rnet. The show the log for PPPD type
cat /var/log/syslog | grep pppdit will show if connection is established successfully.
ifconfig, now you should see another interface named
- To close the connection type
@roberts_lando Great! Thanks a lot!
@tomas_hora Just made a node-red Dashboard to get Modem Data :)
With MNC MCC CellID and LAC it is also possible to get the location of the device by using https://opencellid.org/ APIs
Does anyone know if it's possible to send AT commands from Mervis after turning on the modem first? Thanks.
@oho Support of the GSM functionality will be available in Mervis in the next release.
@roberts_lando hi iam new in node-red and S103-g my question is can you share your nice looking flow to learn better node-red.
@unix I have added it to node-red flows library: https://flows.nodered.org/flow/af6487676bd89e5e8b74b2c9da1e176d
Nice thx for help :smile:
i have inport your data but i get one error in debug
its "3.11.2017, 10:59:29node: parseModelIDfunction : (error)
"TypeError: Cannot read property 'trim' of undefined""
and the website looks like :
connect is green but no info i have only change the serial connect to
or i have problems whit the modem i can send the first sms whitout problems but after this only error when i test it whit cu -l /dev/ttyAMA0
hope for hints :smile:
@unix Did you close the connection after using cu? Cause that error means that I call .trim() in an undefined var (modelID) that means no data is received after the command. Each command has a timeout, after that I close the read stream from the serial and I try to parse the response string, if the response string is not well parsed those errors are normal, try to put a debug node to see the output of the serial and check that the cu session is closed.
Disconnect: type ~ (alt+126) than wait for [unipi] output than type . and hit <Enter>
yes the cu session a closed in debug i see this
3.11.2017, 11:25:11node: 96ac4186.358femsg.payload : string "OK↵" 3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string "AT+COPS? ↵" 3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string "+COPS: 0,0,"A1"↵" 3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string "↵" 3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string "OK↵" 3.11.2017, 11:25:14node: parseOperatorfunction : (error) "TypeError: Cannot read property 'trim' of undefined" 3.11.2017, 11:25:15node: 96ac4186.358femsg.payload : string "AT+CGMI ↵" 3.11.2017, 11:25:15node: 96ac4186.358femsg.payload : string "+CGMI: "Fibocom"↵" 3.11.2017, 11:25:15node: 96ac4186.358femsg.payload : string "↵" 3.11.2017, 11:25:15node: 96ac4186.358femsg.payload : string "OK↵" 3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string "AT+CGMM ↵" 3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string "+CGMM: "GSM850/900/1800/1900","G510"↵" 3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string "↵" 3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string "OK↵" 3.11.2017, 11:25:18node: parseModelIDfunction : (error) "TypeError: Cannot read property 'trim' of undefined"
@unix I haven't the possibility to debug it right now, as your debug shows the commands are correctly received, I think you have to change the serial in-out configuration. Check it and send me a screenshot of both.
Also try to put a debug node after join node wired with serial-out
i have found one error in another flow i have running sms sender i have delete this and the error seems only the trim see screenshots.
i have check the modem connect over cu and modem works and i disconnect to the modem.
@unix ok I have found the problem: replace
serial-outnodes than it should work correctly! This has happen because when you have imported the flow I think you haven't already installed node-red-node-serial and the configuration got lost
WTF great thx for fast response and help :smile:
roberts_lando last edited by
@unix you welcome! :)
Vesa Kauppinen last edited by
I use Raspbian Stretch Lite and I can not get the S103-G to work with these instructions. The command cu -l / dev / ttyAMA0 crashes when I try to AT command. Ifconfig does not give ppp0.
What have I missed?
have you disable the BT on Pi3
and on /boot/cmdline.txt remove
serial console than its looks like
dwc_otg.lpm_enable=0 console=tty1 root=PARTUUID=e13fdf55-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
Vesa Kauppinen last edited by
Thank you for answer!
BT disabled and cmdline.txt edited...
@tomas_hora any ideas?