Pinout

NRF24L01 2.4GHz radio (2×4 header) pinout

Pins

Chip	Nordic nRF24L01+
Supply voltage	1.9–3.6 V (use 3.3 V)
Logic inputs	5 V tolerant
Frequency	2.4 GHz ISM, 126 channels
Data rate	250 kbps, 1 or 2 Mbps
TX power	0 dBm max (PCB antenna version)
Current	11.3 mA TX at 0 dBm, 13.5 mA RX at 2 Mbps
Interface	SPI, up to 10 MHz
Payload	Up to 32 bytes, 6 data pipes
Header	2 × 4, 2.54 mm pitch (not breadboard friendly)

HC-05 / HC-06 Bluetooth serial module (ZS-040)Bluetooth: v2.0 + EDR, Classic SPP (no BLE); Role: HC-05 master/slave; HC-06 slave only; Frequency: 2.4 GHz
RFID-RC522 reader (SPI)Chip: NXP MFRC522; Frequency: 13.56 MHz; Supported cards: ISO/IEC 14443 A, MIFARE Classic/Ultralight
LoRa module (RFM95W / SX1276-family)Transceiver: Semtech SX1276 (RFM95W); Frequency: 868 / 915 MHz (RFM95W); 433 MHz on RFM96/98W; Supply voltage: 1.8–3.7 V (no onboard regulator)
GPS NEO-6M module (GY-NEO6MV2)Receiver: u-blox NEO-6M; Signal: GPS L1, 1575.42 MHz; Channels: 50
SIM800L GSM moduleNetwork: 2G only: GSM/GPRS quad-band 850/900/1800/1900 MHz; Supply voltage: 3.4–4.4 V (≈ 4.0 V ideal, not 5 V); Peak current: Up to 2 A transmit bursts
CP2102 / CH340 USB-to-serial adapter (6-pin)Chip: Silicon Labs CP2102 or WCH CH340; USB: USB 2.0 full speed (12 Mbit/s); Baud rate: CP2102: 300 bps–1 Mbps; CH340: 50 bps–2 Mbps
MAX485 RS-485 transceiver module (8-pin breakout board)Transceiver: MAX485; Supply voltage: 5 V (4.75–5.25 V); Logic level: 5 V (use MAX3485/SP3485 for 3.3 V)
CAN bus transceiver module (MCP2515 + TJA1050)Controller: Microchip MCP2515 (CAN 2.0B); Transceiver: NXP TJA1050; Supply voltage: 5 V (TJA1050 is 5 V only)