Battery powered, an ammeter is connected in series with the positive pole of the battery, and use this example code:
The deep sleep current should close to 900uA, test results are as follows:
Because the WiFi LoRa 32 uses an external flash chip, it’s not friendly for low power design. We designed many new LoRa Nodes with good low power design, I recommend you can choose from our new LoRa Node Family: https://docs.heltec.cn/#/en/products/lora/lora_node/heltec_lora_node_list_eu