I have connected all the wires as shown in the diagram but I can't make it work. I can display text but with limited functions and keypad is not working. Can anyone suggest what library should i use I have tried a few 2-wire libs.
hi thanks for the reply I sorted my problem. just curious i made it work but i have to invert the connection from the module to arduino. RX to TX and TX to RX? why?
Another question. I need to power up to devices on my arduino uno. the LCD & Keypad module is already connected to vin and gnd, can I just hook them together in that pin together?
metalmouth:
hiI sorted my problem. just curious i made it work but i have to invert the connection from the module to arduino. RX to TX and TX to RX? why?
Because the E-term sees itself as a terminal-end device connecting to a modem, whilst the Arduino sees itself the same way - both think "transmit" is what they are sending out and "receive" is what they are taking in, so you have to cross them over if two "terminals" are talking to each other.
metalmouth:
Another question. I need to power up to devices on my arduino uno. the LCD & Keypad module is already connected to vin and gnd, can I just hook them together in that pin together?
Vin is where you feed about 8 to 10 volts into the Arduino so that it can be regulated down to 5V. It does not feed power out as such. If you parallel other devices to the same terminal so that they share the power supply you have connected, that is OK if they also operate at that same voltage.
metalmouth:
hiI sorted my problem. just curious i made it work but i have to invert the connection from the module to arduino. RX to TX and TX to RX? why?
Because the E-term sees itself as a terminal-end device connecting to a modem, whilst the Arduino sees itself the same way - both think "transmit" is what they are sending out and "receive" is what they are taking in, so you have to cross them over if two "terminals" are talking to each other.
metalmouth:
Another question. I need to power up to devices on my arduino uno. the LCD & Keypad module is already connected to vin and gnd, can I just hook them together in that pin together?
Vin is where you feed about 8 to 10 volts into the Arduino so that it can be regulated down to 5V. It does not feed power out as such. If you parallel other devices to the same terminal so that they share the power supply you have connected, that is OK if they also operate at that same voltage.
Just what I wanted to hear. But I'm just a little bit confused with what you said "into" and "out". The power to the LCD(8-12v) is coming from arduino's vin how come you say it does not feed power out?