Simple Serial Communication. Hello, I bought the card GSM 800L Sim and I uploaded the sketch as shown, it works, I connected an antenna, a power supply 9v 1 ampere and usb connection. Does the moden disconnects from the network when it happens? (red led blinking every secont untill the modem reconnects?) Reply. Stefan January 20, 2018 4. Simple Serial Communication. Hello, I bought the card GSM 800L Sim and I uploaded the sketch as shown, it works, I connected an antenna, a power supply 9v 1 ampere and usb connection. Does the moden disconnects from the network when it happens? (red led blinking every secont untill the modem reconnects?) Reply. Stefan January 20, 2018 4.

Mini GSM/GPRS module SIM800L is a miniature cellular module which allows for GPRS transmission, sending and receiving SMS and making and receiving voice calls. Low cost and small footprint and quad band frequency support make this module perfect solution for any project that require long range connectivity. After connecting power module boots up, searches for cellular network and login automatically. On board LED displays connection state (no network coverage - fast blinking, logged in - slow blinking). NOTICE: Be prepared to handle huge power consumption with peek up to 2A. Maximum voltage on UART in this module is 2.8V.

Higher voltage will kill the module. Two antennas!

This module have two antennas included. First is made of wire (which solders directly to NET pin on PCB) - very useful in narrow places. Second - PCB antenna - with double sided tape and attached pigtail cable with IPX connector. Foto wanita ber dada montok. This one have better performance and allows to put your module inside a metal case - as long the antenna is outside. Specification • Supply voltage: 3.8V - 4.2V • Recommended supply voltage: 4V • Power consumption: • sleep mode.

Dhylands wrote:Did you connect TX from the UART to RX on the SIM800? And RX from the UART to Tx on the SIM800? And also connect grounds beteween the two devices? Hi Yep, I have linked every pins from the WiPy to the GSM board: the GND and the 5v (from an USB cable that I have customize) (I have the LED flashing) and the TXD and RXD to the PIN 16 and 17 and the RESET to the Pin 22. It might be related to an issue with the SIM card itself.I'll try to put the SIM card into a phone to be sure it is working.

If you have any other guess, let me know, I'll try them. Roberthh wrote:Hello @gabi, If you think that the connection is right (TX(Wipy) to RX(GSM), RX(Wipy) -> TX(GSM), GND to GND), the I would first verify that WiPY can send and receive. The simplest method would be to just disconnect GP16 and 17 from the modem and join GP16 and GP17. Then you should receive back what you just have sent.