# Adafruit Feather M4 Express LoRa HAT(915MHz) ## Description This project is a communication device designed with Adafruit's 3857 Microcontroller (U1) and Hoperf's RFM95W-915S2 RF module (U2). The microcontroller interfaces with the RF module via SPI protocol for wireless data transmission. The project also includes a capacitor (C1) and an SMA connector (J1). #LoRa #IoT #project #M4 #Adafruit ## Project Details - **Owner:** vasyl - **Created:** 1/8/2024 - **Last Updated:** 1/8/2024 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Copies:** 1 ## Key Components ### J1 — [SMA-J-P-H-ST-EM1](https://www.flux.ai/jecstronic/sma-j-p-h-st-em1~0a1.md) - Manufacturer Part Number: SMA-J-P-H-ST-EM1 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: http://suddendocs.samtec.com/catalog_english/sma.pdf - Part Type: Connector - Manufacturer Name: Samtec Inc. **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### U1 — [Adafruit Feather M4 Express](https://www.flux.ai/vasyl/adafruit-feather-m4-express~ajx.md) - Part Type: Evaluation Boards - Manufacturer Name: Adafruit Industries LLC - Manufacturer Part Number: 3857 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/761/3857_Web.pdf **Pins:** - 3V [pin 2] - A0 [pin 5] - A1 [pin 6] - A2 [pin 7] - A3 [pin 8] - A4 [pin 9] - A5 [pin 10] - AREF [pin 3] - BAT [pin 17] - D10 [pin 23] - D11 [pin 22] - D12 [pin 21] - D13 [pin 20] - D4 [pin 16] - D5 [pin 26] - D6 [pin 25] - D9 [pin 24] - EN [pin 18] - GND [pin 4] - M0 [pin 12] - MI [pin 13] - RST [pin 1] - RX [pin 14] - SCK [pin 11] - SCL [pin 27] - SDA [pin 28] - TX [pin 15] - USB [pin 19] ### U2 — [RFM95W-915S2](https://www.flux.ai/vasyl/rfm95w-915s2~5r.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Hoperf letrnc - Datasheet URL: https://cdn.sparkfun.com/assets/learn_tutorials/8/0/4/RFM95_96_97_98W.pdf - Manufacturer Part Number: RFM95W-915S2 - Part Type: RF module **Pins:** - 3.3V [pin 13] - ANT [pin 9] - DIO0 [pin 14] - DIO1 [pin 15] - DIO2 [pin 16] - DIO3 [pin 11] - DIO4 [pin 12] - DIO5 [pin 7] - GND [pin 8] - GND [pin 10] - GND [pin 1] - MISO [pin 2] - MOSI [pin 3] - NSS [pin 5] - RESET [pin 6] - SCK [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasyl/adafruit-feather-m4-express-lora-hat915mhz~c1t](https://www.flux.ai/vasyl/adafruit-feather-m4-express-lora-hat915mhz~c1t).* --- *Generated from [https://www.flux.ai/vasyl/adafruit-feather-m4-express-lora-hat915mhz~c1t](https://www.flux.ai/vasyl/adafruit-feather-m4-express-lora-hat915mhz~c1t)*