Taiwan based Blkbox may have designed the world’s smallest WiFi IoT module with their Espressif Systems ESP8285 based BB-E01P module pin-compatible with ESP-01 module, and measuring just 14×10 mm.
BB-E01P module specifications:
- WiSoC – Espressif ESP8285 WiFi SoC with 1MB internal flash
- Connectivity – 802.11 b/g/n WiFi with chip antenna
- Expansion – 8-pin (2.54mm pitch) with Tx/Rx, CP, RS, GPIO0, GPIO2, 3V, GND (Same layout as ESP-01)
- Misc – Jumper supports Deep Sleep Mode (AT+GSLP)
- Power Supply – 3-3.6V
- Dimensions – 10 x 14 mm
The board is preloaded with firmware version AT v1.6 / SDK v2.2.
The module can be purchased on Tindie for $6.80 + shipping, so not quite as cost effective as ESP-01 module, but if the size / thickness is important for your project, that may still be worth it. The developer/company? seems to specialize in tiny modules, and they have a slightly larger (19x13mm) module with ESP8266 SoC.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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