S103-G use GSM/GPRS module to connect to internet

roberts_lando

I have just bought an UNIPI Neuron S103-G because I need to install the Unipi in a mobile station without internet connection. I have put the sim in the slot and now I'm tring to configure the module but I'm neither able to switch on the module with the commands you have provided in docs:

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

I get the following error:

root@unipi:/sys/class/gpio# echo out > /sys/class/gpio/gpio18/direction
-bash: /sys/class/gpio/gpio18/direction: No such file or directory

The gpio dir contains:

root@unipi:/sys/class/gpio# ls
export  gpio27  gpiochip0  gpiochip100  gpiochip128  unexport

I'm using the Mervis image you provide in download section: UniPi-Mervis-OS-2017-08-28_v1.3

P.S: Is a support planned with evok Web Interface?

tomas_hora

@roberts_lando You need to export the GPIO to FS first by

echo 18 > /sys/class/gpio/export

I have added the missing line to the howto.

Support for GSM/GPRS is not yet planned in Evok

roberts_lando

I already did it, now I'm tring to configure the module to connect to internet, for now I was just able to send an sms but maybe this could be useful for someone so i will post my tutorial here:

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 cu

apt-get install cu
chown root:root /dev/ttyAMA0
cu -l /dev/ttyAMA0

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

//EXIT CU
~. <Enter>

Now I'm using this tutorial to do what I want but I'm stucked in step 2, I'm not able to find the USB switching codes because the command lsusb doesn't lists the FIBOCOM G510 module:

Bus 001 Device 004: ID 04d9:1702 Holtek Semiconductor, Inc.
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Neighter the command df doens't shows the /dev/ttyAMA0 interface. I have try to add enable_uart=1 to /boot/config.txt file but doesnt't works.

Any suggestion @administrators? Thanks

tomas_hora

@roberts_lando You got the wrong tutorial, try eg this one: http://www.rhydolabz.com/wiki/?p=16325

roberts_lando

Thanks @tomas_hora I did it now! If you want I can make a full tutorial about this topic

roberts_lando

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 cu

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 . and hit <Enter>

~[unipi]. <Enter>

If interface doesn't works try:

Enable UART: nano /boot/cmdline.txt add (if not present) or edit this line: enable_uart=1. Close and save the file by typing Ctrl+X and 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

Replace <yourAPNhere> with your APN (Search in google APN of "your mobile operator") close and save the file by typing Ctrl+X and Y
If your SIM card has a PIN edit this file nano /etc/chatscripts/gprs un comment the line AT+CPIN=1234 and set the pin instead of 1234
Enable the connection by typing pon rnet. The show the log for PPPD type cat /var/log/syslog | grep pppd it will show if connection is established successfully.
Type ifconfig, now you should see another interface named ppp0.

0_1507015540134_upload-6607adf9-72d1-4cc9-97e2-cbe5b291b1c7

To close the connection type poff rnet

tomas_hora

@roberts_lando Great! Thanks a lot!

roberts_lando

@tomas_hora Just made a node-red Dashboard to get Modem Data :)

0_1507124912843_upload-f44d0f00-3612-47f8-aa08-91819d6ff5fe

0_1507124782319_upload-8a2171eb-31ce-403a-8b88-428e8162c1b4

With MNC MCC CellID and LAC it is also possible to get the location of the device by using https://opencellid.org/ APIs

oho

Re: S103-G use GSM/GPRS module to connect to internet

Does anyone know if it's possible to send AT commands from Mervis after turning on the modem first? Thanks.

tomas_hora

@oho Support of the GSM functionality will be available in Mervis in the next release.

unix

@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.
regards

roberts_lando

@unix I have added it to node-red flows library: https://flows.nodered.org/flow/af6487676bd89e5e8b74b2c9da1e176d

Enjoy :)

unix

Nice thx for help :smile:
Regards

unix

Hi
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 :
Daschboard
connect is green but no info i have only change the serial connect to
/dev/ttyAMA0: 115200-8n1

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:

Regards

roberts_lando

@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>

unix

Hi
yes the cu session a closed in debug i see this

3.11.2017, 11:25:11node: 96ac4186.358femsg.payload : string[4]
"OK↵"
3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string[11]
"AT+COPS? ↵"
3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string[17]
"+COPS: 0,0,"A1"↵"
3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string[2]
"↵"
3.11.2017, 11:25:13node: 96ac4186.358femsg.payload : string[4]
"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[10]
"AT+CGMI ↵"
3.11.2017, 11:25:15node: 96ac4186.358femsg.payload : string[18]
"+CGMI: "Fibocom"↵"
3.11.2017, 11:25:15node: 96ac4186.358femsg.payload : string[2]
"↵"
3.11.2017, 11:25:15node: 96ac4186.358femsg.payload : string[4]
"OK↵"
3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string[10]
"AT+CGMM ↵"
3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string[38]
"+CGMM: "GSM850/900/1800/1900","G510"↵"
3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string[2]
"↵"
3.11.2017, 11:25:17node: 96ac4186.358femsg.payload : string[4]
"OK↵"
3.11.2017, 11:25:18node: parseModelIDfunction : (error)
"TypeError: Cannot read property 'trim' of undefined"

Regards

roberts_lando

@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

unix

@roberts_lando
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.

1 alt text
2
3

Regards

i have check the modem connect over cu and modem works and i disconnect to the modem.

roberts_lando

@unix ok I have found the problem: replace \n with \r\n in both serial-in and serial-out nodes 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

unix

@roberts_lando

WTF great thx for fast response and help :smile:

regards