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Supports Full and Half-Duplex modes Automatic Programmable Retransmit on Collision Programmable Padding and CRC Generation Automatic Rejection of Erroneous Packets SPI Interface with Clock Speeds Up to 20 MHz The board 25MHZ crystal. The network interface board HR911105A. 5 V power supply pin. Stable performance. For Arduino SPI, AVR, PIC, LPC, STM32.
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Power dissipation:1w Power supply: 1.1-3.6V DC – typically 3.3V DC Resolution: 16bit Temperature measuring range: -40-125 ° C Temperature measurement resolution: 0.01 ° C Temperature measurement accuracy: ± 0.2 ° C Humidity measurement range: 0-100% RH Humidity measurement resolution: 0.01 RH Humidity measurement accuracy: ± 1.8% RH
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RP2040 microcontroller with 2MB of flash memory On-board single-band 2.4GHz wireless interfaces (802.11n) Micro USB B port for power and data (and for reprogramming the flash) 40 pin 21mmx51mm ‘DIP’ style 1mm thick PCB Exposes 26 multi-function 3.3V general purpose I/O (GPIO) 23 GPIO are digital-only, with three also being ADC capable