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Public street lighting is one of the facilities for road completeness. This is due to the condition of national electricity which is still experiencing a shortage. With 8.9% of the population that has not been electrified. Therefore, lighting on public roads needs to use energy-saving lamps, namely lamps based on LED technology. The use of this LED technology is quite dependent on the characteristics of the LED chip, as well as on the temperature changes generated by the components in the luminaire against the weather. Therefore, it is necessary to carry out photometric, electrical, and temperature (PET) monitoring. That's what this data logger system is designed for. This data logger records temperature, humidity, voltage and current. Temperature and humidity are read using the DHT11 sensor, the voltage using the ZMPT101B sensor and the current using the SCT013 sensor. The output of the DHT11 sensor is directly connected to the input pin of the ESP8266 as the processing module, while the output of the ZMPT101B and SCT013 sensors is connected to the ADS1115 ADC module before being inputted to the ESP8266. The ADS1115 converts the analog inputs of the ZMPT101B and SCT013 into 16 bit digital values. Using I2C communication, the data is sent to the ESP8266. The ESP8266 has an integrated WiFi module. Using this module, data is sent over the Internet to the database server. The data is recorded into a database to be stored and then processed according to the needs of monitoring the condition of the street lamp luminaires. [ABSTRACT FROM AUTHOR]