SIM808 instead of SIM908 Module GSM GPRS GPS Development Board

Description Thank you for visiting our product page! We strive to provide you with an effortless shopping experience. Our checkout process is simple and offers various shipping options with tracking. Furthermore, we believe in maximizing the value of your purchase. On this website, you can find detailed instructions on how to use this product and explore various projects we have created using it. These resources are designed to help you make the most of your purchase. How to use this product — Click on me Free projects and tutorials — Click on me If you have any questions or encounter any issues, our dedicated customer support team is always ready to assist you. Please don’t hesitate to reach out to us through our user-friendly Contact Us page. We are committed to ensuring your complete satisfaction. Lastly, we highly value your feedback. Once you have experienced our product, we would greatly appreciate it if you could leave a review. Your opinion matters to us! Thank you for considering our product. We look forward to serving you. Product details Description 1. Three power input interfaces: DC044 interface and V_IN and a lithium battery interface. Note that: The range of DC044 and the V_IN pin voltage input is 5 – 26V, when using the 5V as the power, be sure that the power supply can provide 2A current. The voltage range of Lithium battery input power is 3.5 – 4.2V. 2. Switch: It is used to open/close the input power supply for the module. When in use, please confirm the toggle is switched to the OPEN state (near the board inside). 3. SMA antenna interface: there is a GSM antenna interface, a GPS antenna interface onboard, and a BT antenna interface. 4. Start button: When the board is powered on, the LED (PWR) will light up. After a long press (about 2 seconds) on this button, the other three LEDs will be light. One of them starts to flash; this suggests that SIM808 is beginning to work now. When the power supply, GSM GPS antenna, and SIM card are connected to the module correctly, the LED will be flash slowly (3Second de 1second light), which indicates that the module is registered to the network, and you can make a call or do something else. 5. TTL serial interface: a TTL-level interface. Notice that: The pin of VMCU is used to control the high level of TTL UART, so as to realize a match between 1.25V/3.3V /5V systems. For example, if you want to use the 51 MCU to control this board, the pin of the VMCU should be connected to the DC5V. If using the STM32 MCU, the pin of the VMCU should be connected to the DC3.3V. The pins of RXD is the RXD of SIM808 and the pins of TXD are the TXD of SIM808. The pin of V_IN can connect the Power, the function of this pin has the same function as DC044. 6. USB interface: This interface is just used to update the firmware of the SIM808 module.