First of all, what is a gateway used for? It’s simply a device that can provide an Internet connection to an asset or a group of assets not connected to the Internet.

This is what offers the TRB 145 and 142 from Teltonika:

• TRB 145: allow to connect an asset equipped with RS 485 port
• TRB 142: allow to connect an asset equipped with RS 232 port

What do we like about those two:

• the design: simple and robust
• a stable and reliable power supply 9-30 V DC
• the possibility to plug a battery BAT120
• bonus: the rack DIN option to plug it in an electrical table

How to use those gateways? If you want to push data from an automata, it’s quite simple:

1. connect the TRB to the serial (485 or 232)
2. configure the serial port in read mode
3. read the data
4. send the data to BAG·Tower
5. go back to step 1 for continuous monitoring

Here is a code sample that reads the RS 485 or 232 serial port and sends the data to BAG·Tower.

#!/bin/sh

API_KEY=__ASSET_API_KEY__

# Set serial port parameters
SERIAL_PORT="/dev/ttyRS485-0"
BAUD_RATE="9600"
TIMEOUT="10"

# Configure the serial port
stty -F $SERIAL_PORT $BAUD_RATE cs8 -cstopb -parenb

# Send the command to the RS-485 device (replace 'YOUR_COMMAND_HERE' with your actual command)
echo -n "YOUR_COMMAND_HERE" > $SERIAL_PORT

# Capture the response into a string
read_value=$(timeout $TIMEOUT cat $SERIAL_PORT)

# Send the captured data to an API using curl
curl -s -X POST "https://api.bagtower.bag-era.fr/v2/logs" -H "Content-Type: application/json" -H "x-api-key: $API_KEY"  -d "data=$read_value"

echo "Data sent to the BAG·Tower!"

 

To continuously send the data, you can put this script in a crontab

crontab -e
 

Here is the crontab to send the data every 10 minutes

*/10 * * * * /usr/bin/sh /bin/sh /root/push_bagtower.sh