ESP8266 ESP-12S A9 GSM GPRS IOT node IOT prototyping board with all in one Wifi with GSM GPRS WiFi+GPRS combo antenna? Yes! ESP-12S A9 GSM GPRS IOT node, 2 in 1 mobile phone module with WiFi module that allows you to add location tracking, text, SMS and data transmission to your projects. This IoT node has both WiFi and GPRS support. This means that it is perfect for any wireless or internet-connected project. It is ESP-12S A9 GSM GPRS IOT node based on ESP-12S module and A9 mobile phone. Both modules are from ai-thinker. With built-in USB charging and battery functions, it is a true IOT breadboard. The heart of the IoT node is a WiFi ESP8266 microcontroller with a clock frequency of 80 MHz and a logic voltage of 3.3V. The microcontroller contains a Tensilica chip core along with a complete WiFi stack. We connected the CH340C USB serial chip, which can transmit code at an astonishing 921600 baud rate to speed up development. It also has an auto-reset function, so there is no pin and press reset button. A9 is widely used in home automation, industrial wireless control, wireless location-aware devices and other Internet of Things. Sim! 2G Nano SIM is required to do everything on the mobile network. AT&T in the US no longer sells 2G SIMs and is shutting down its 2G network, so for US customers, we recommend using any t-mobile or reseller on the t-mobile network (TING, SIMPLE Mobile, etc.). Size: 8x5cm Material: pvc Color: Blue Package Contents: 1 x ESP-12S IOT A9 GSM GPRS Node 1 x GSM Antenna Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.