The ESP8266, using the Tasmota firmware, sends a signal to an MQTT server running on the Raspberry Pi, which in turn translates it to a remote trigger on the Zigbee frequency with the dongle.
Although Zigbee (Z-wave) sensors have longer range ... as rtl_433 can output the decoded data directly to an Influx database, MQTT broker as well as other formats. In this case, the data was ...