Hardwire interfacing Moteino with Arduino - Newbie question [SOLVED]

[K1JOS]

I would like to use a graphic touch screen for my project.  I have it working fine with my Arduino Uno.  My Gateway Moteino will be processing received compass data from a Moteino node sensor and I would like to pass data bidirectionally from my Moteino Gateway and the Uno in order to use the Graphic touchscreen as the GUI.  I am about to try this with the SoftwareSerial library but I dont know whether to use hardware or software interrupts, what is the best flow control if any, etc, etc.

Any advice appreciated (especially any examples)

thanks in advance
Jerry 

[Felix]

Jerry,
I have not personally used a touch screen with Moteino. Maybe someone else has. You mentioned software serial, that should work, but reliability will be less than hardware serial (maybe 99% of hardware serial). Also Moteino is 3.3V while UNO is 5V. Maybe you should wait for Moteino MEGA instead, it will be 5V and have  an extra hardware serial.

[K1JOS]

Thanks Felix,


When you do think you will be ready to ship the Moteino Mega?

j

[Felix]

Not sure, I'm waiting for my second prototype that hopefully fixes the issues I've had. If that is good I will have to start with a small batch since the 1284p chips are so expensive. I expect sales to be low because of that, hence I have to stock low for now. But I'm looking at at least 4-6 weeks from now.

[hdphilip]

jerry,

It should work, I've used a ST7735 1.8" color lcd in hardware spi mode, on my moteino base board with no problems.

Felix, 

Are you going to have a place for a 18b20 temp sensor in a location close to the RFM's crystal for temp compensation?
I've found it works Great!


Philip

[K1JOS]

Philip,

Does your setup also use the RFM69 or is it a bare Moteino?  I thought there could be SPI conflicts using both RFM69 plus anything else on SPI bus.

thanks in advance
Jerry

[hdphilip]

jerry

I first bread boarded the moteino (RFM69HW) with the ST7735 160x128, I used a hardware spi library (modified version of adafruits). and it worked fine. no conflicts so far.

I also have a DS3231 RTC connected to the I2C bus. A 18b20 temp sensor to monitor case temp for my TCXO control loop.

Philip