ESP8266 WeMos D1 Mini Lite - ESP-12 USB WiFi Development Board cellular module these modules are relatively inexpensive

these modules are relatively inexpensive

and x-ray proof

Product Water Pump Immersible and Water Tube Brand Circuitrocks Product Type Pump Primary SKU FIT0200 Product URL https://circuit

Relative air humidity: 45~85%RH

ESP8266 WeMos D1 Mini Lite - ESP-12 USB WiFi Development Board cellular module these modules are relatively inexpensiveWeMos D1 Mini Lite The Smallest ESP8285 Board for Wearables and Space Constrained Builds The WeMos D1 Mini Lite is built around the ESP8285 not the ESP8266. The ESP8285 is a compact variant of the ESP8266 with 1 MB of flash integrated directly into the chip die, eliminating the external flash IC and enabling an incredibly small board footprint. If you are building a wearable, a tiny sensor node, or any project where PCB size is a hard constraint, the