Integrated Circuits

One AD inputs. Micro USB inputs. One programmable LED (D0). AUTO PROGRAM circuit. ESP8266 (ESP-WROOM-02 With TELEC) is equivalent to the NodeMCU. Analog Input (AD): Built-in dividing resistor (AD = 220K – ADC – 100K = GND). There is a SOLDER terminal for SLEEP MODE. Compatible With Arduino and NodeMCU. Operation and charging are possible at the same time. 18650 charging circuit including the 5V boosting circuit with TP5410. Overcharge protection, over-discharge protection built in. LED: Red = Charging, Green = Full charging. 3000 mA 18650 It is possible to operate for more than 17 hours on a battery. Integrated 18650 battery charging and discharging system. One switch controls whether the 18650 battery is powered or not. OLED’s SDA and SCL connected to the D1 pin and the D2 pin respectively. The five buttons are controlled by FLATH, RSET, D5, D6, and D7 respectively. The 5 Digital pins can configure the write/read/interrupt/PWM/I2C/one-wire supported separately. Operation and NodeMCU consistent, adding a programmable LED, you can use GPIO16 to control, display 8266 running status and other functions. Integrated OLED and five buttons, more convenient for development. The design concept originates from the open source project NodeMCU, and the development board integrates 18650 charging and discharging systems with charging and discharging protection. At the same time, an OLED and five directional buttons are integrated to facilitate the development.

Supports Bluetooth / TTS / DTMF function; 2. Reserve IPEX interface, SMA interface, spring antenna interface, it can be used for different occasions, different antennas; 3. Send reference program(please contact the servicer). Product Features 1. Input voltage range 5V-20V DC, power supply range for a variety of power supply applications, it makes students and projects more convenient to use, GPRS module communicates in peak current, low voltage, so the higher the development board supply voltage, The smaller current makes the power supply pressure smaller, the integrated GPRS module to the product, the need to consider the development board of the power circuit, as far as possible making the width of more than 1mm power line, the shorter the better; 2. module connected to the power automatically after connected to the network, do not need to control the boot button, power directly to start, eliminating the need for trouble starting process, reserved boot pin, you can control the user switch; 3. TTL module with a level conversion circuit, compatible with a variety of single-chip serial port. Do not need to convert the direct connection; 4. Audio interface, pin-oriented way to facilitate the test, reverse headphones and microphone interface; 5. Bluetooth, Bluetooth 3.0 protocol, enhanced Bluetooth antenna signal super, support for serial SPP and audio services; 6. Reserve lithium battery-powered BAT interface, you can use the lithium battery-powered to facilitate the project development, 3.7V lithium battery or 18650 lithium battery; 7. Reserve IPEX interface, SMA interface, spring antenna interface, can be used for different occasions, different antennas.