GPRS IoT shield

userHead Account cancelled 2017-02-27 22:13:14 800 Views1 Replies
I bought 3 of the GPRS IoT shield and none of them is able to get into the AT environment inspite of following the instructions given. Only gibberish on the screen.
I set to usb mode and baud rate to 9600 with NL and CR. Please see attached picture.
icon SIM800.jpg Download(0)
2017-03-01 14:18:18 Hi,

Since this shield is using serial port, please make sure the serial port is not occupied. You can burn a blink to your UNO first. And dial the switch to the right place. And please make sure you have inserted the SIM card, if there is not a SIM card, it wouldnt enter into AT mode.
userHeadPic Wendy.Hu