Fast IoT connection to low-power wireless modules

Mouser is now stocking the MRF24WN0MA and MRF24WN0MB wireless modules from Microchip. The low-power, 2.4GHz, IEEE 802.11b/g/n-compliant transceiver modules interface with their PIC32 microcontrollers and are supported by the MPLAB Harmony integrated software framework with a TCP/IP stack. Both network-enabled modules can be quickly developed into almost any design, including IoT applications. The modules offer a range up to 300m with low current consumption that is specified at 64mA (typical) in Receive (RX) mode and 246mA at 18dBm (typical) in Transmit (TX) mode. The devices provide associated RF components, including a crystal oscillator, bypass and bias passives with integrated MAC, RF and power amplifiers, baseband, and built-in hardware support for encryption. The two modules differ only in the type of antenna required: The MRF24WN0MA module is approved for use with an integrated PCB trace antenna, whereas the MRF24WN0MB module includes an ultra-small W.FL coaxial connector and is approved for use with specific certified external antenna types. The company’s wireless modules have received FCC and IC modular approval, and are also R&TTE Directive assessed radio modules for operation in Europe. The modular device tests can be applied toward final product certification and DoC. The modules are available in a 37-pin surface mount package that measures 17.8mm × 26.7mm × 2.2mm. The castellated surface mount pads allow for easy and reliable PCB mounting, and both modules are ideal RF wireless solutions for low-power, low-data-rate Wi-Fi sensor networks, home automation, industrial controls, consumer electronics, remote device management, and medical and fitness applications.