GPRS module with M590 for SMS projects

” In 1st part I present you few data about GPRS module with M590 chip and how send SMS from them. In 2rd part I send SMS from phone and SMS is received by GPRS module with M590, also with Arduino Mega board cand control 4 leds, depend text from SMS. M590 chip from Neoway is an old, industrial and… recovered (second hand) chip for GPRS/GPS as SIM900. Is enough for our tests with Arduino… Main reason for i use Arduino Mega board instead Arduino Uno is number of harware serial port… M590 chip has defauld speed set at 115200bps, too much for SerialSofware (see - SoftwareSerial). Theoretical, this library work fine at this speed but all my Arduino board (original and clone) not work good.”