本影片用 INA228 測量 SX1278 在不同輸出功率的電流,及不同的 Bandwith & Spread Factor 下 SX1278 的發射時間。在使用測量到的最短發射時間及最小輸出功率,使用相同 260 mAh 電池,可使用約 250 天左右 ( 每分鐘發射一筆温濕度資料 ) ESP32 240MHZ Default. LoRa SX1278 (RA-02 module): Po = 2dbm ...
Working Current - Transmit: less than 120mA(+20dBm) Sleep Current: 0.2uA Working temperature: -40- +85 degrees Pin pitch: 2.0 mm Documentation *** Click to enlarge *** Package Includes 1 x RA-02 Module SKU:LOR0-410Categories:LoRa Modules,Wireless ModulesTags:lora,sx1278,wireless...
Specifications: Product Specifications: - RF Chip: SX1278 - Frequency Range: 433 MHz - Interface: SPI - Module Type: SX1278 LoRa Spread Spectrum Wireless Module - Antenna Options: Spring antenna (Ra-01) or IPEX external antenna (Ra-02) - Operating Range: Up to 15 km with +20 DBM power...
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Instead of using an ESP32 and a separated LoRa transceiver module, there are ESP32 development boards with a LoRa chip and an OLED built-in, which makes wiring much simpler. If you have one of those boards, you can follow:TTGO LoRa32 SX1276 OLED Board: Getting Started with Arduino IDE....