SIMCOM

SIM800 support Quad-band 850/900/1800/1900MHz, it can transmit Voice, SMS and data information with low power consumption. With tiny size of 24*24*3mm, it can fit into slim and compact demands of custom design. Featuring Bluetooth and Embedded AT, it allows total cost savings and fast time-to-market for customer applications.

AMPHENOL SGX SENSORTECH

The MiCS-6814 is a robust MEMS sensor for the detection of pollution from automobile exhausts and for agricultural/industrial odors.

BOSCH

This is a breakout board model for the BOSCH sensor BME280. The board is commonly found in aliexpress.