Subscribe to MQTT
If you have installed the chirpstack-gateway-os-full image, then a MQTT broker (Mosquitto) is pre-installed and pre-configured.
Subscribing
The MQTT broker is pre-configured with two listeners. Connections from the same host (Raspberry Pi) no not require a client-certificate or any credentials. If you are connecting from a different host, then you must use a client-certificate in order to connect to the MQTT broker. This client-certificate can be generated using the ChirpStack web-interface. Please find instructions below.
Same host
If connecting from the same machine (Raspberry Pi), you can use the following command to receive data:
mosquitto_sub -h localhost -t "application/#" -v
Different host
If connecting from a different host, you must obtain a client-certificate first using the ChirpStack web-interface.
- Navigate to the application for which you want to receive data
- Click the Integrations tab
- Click Get certificate under the MQTT integration card
- Click Generate certificate to obtain the certificate files
- Store the three files on the machine from which you want to connect to the
MQTT broker:
- CA certificate:
ca.pem
- TLS certificate:
cert.pem
- TLS key:
key.pem
- CA certificate:
After completing the above steps, you can use the following command to receive data:
mosquitto_sub -h IPADDRESS -p 8883 --insecure --cafile ca.pem --cert cert.pem --key key.pem -t "application/#" -v
Note: Replace IPADDRESS
with the IP address of the Raspberry Pi. Also
note the --insecure
flag, which is required to ignore the certificate
hostname validation.