SX1278 LoRa Module PCB TWI interface (SDAA4 and SCL

TWI interface (SDAA4 and SCL A5): support communication interface (compatible with I2C bus)

and remote sensors

16 have Green filters and the rest 16 photodiodes are clear with no filters

Color: Sky blue

This is what you need for your 3D printer or transmission mechanism

SX1278 LoRa Module PCB TWI interface (SDAA4 and SCLIntroduction : Modulation Technology: LoRa Spread Spectrum RF Power Output: Constant at +20dBm (100mW) Sensitivity: Down to 148dBm Communication: Half duplex SPI Programmable Bit Rates: Up to 300kbps Modulation Modes Supported: FSK, GFSK, MSK, GMSK, LoRa and OOK RSSI Dynamic Range: 127dB Features: Automatic RF signal detection, CAD mode, high speed AFC Packet Engine: CRC up to 256 bytes