Zabbix-DHT11

Monitoring DHT11 with Zabbix

Collect temperature and humidity data from DHT11 sensor connected to RPi.

Details of operation:

1. The "query schedule" item send a request to dht.query agent key.
2. The agent run the assigned key command (dfy_split.pl) with given parameters.
3. The script get datas from DHT11, format them for the zabbix_sender and send.
4. The Zabbix server receives the values and work with defined trapper items.

Install:

1. Copy userparameter_dht.conf on RPi to Zabbix agent userparameter config directory.
2. Increase the Timeout to minimum 10 in /etc/zabbix/zabbix_agentd.conf and restart agent.
3. Copy dfy_split.pl to RPi /usr/bin/. If use other directory, then please modify the path in userparameter_dht.conf.
4. Install DHT11 binary code from DHT11 repository.
5. Add the zabbix user to gpio group in /etc/group file (like: gpio:x:997:pi,zabbix).
6. Load the DHT_sensors_template.xml in Zabbix server and
   • change in query schedule item the zabbix.mydomain.hu string to your Zabbix server name
   • change Humidity and Temperature items alloved hosts value to your RPi (registered in Zabbix) name
   • and assign template to RPi.
7. Enjoy!

Tested environment:
RPi3B+ Linux 4.19.66-v7+, Zabbix 4.2