I am trying to communicate from my raspberry PI to a teensy (a arduino that can pretend to be a mouse and keyboard for those uninitiated).
I want to receive information on the arduino, and based on that information move the mouse.
On the arduino side, I have made this test script:
void setup() {
Serial1.begin(9600); // According to the Teensy Docs, this is the RX1 & TX1 on my board.
// Serial itself corrosponds to the micro-usb port
}
String msg = "";
void loop() {
if(Serial1.available() > 0) {
msg = "";
while(Serial1.available() > 0) {
char read = Serial1.read();
msg += read;
}
Serial1.write('X'); // Acknowledge with reply
}
Serial1.println(msg); // Output to console for debugging
// Should be a number 1-9
// TODO: further processing
}
On the raspberry pi, I am running this test script:
import time
import serial
import random
ser = serial.Serial(
port='/dev/ttyS0',
baudrate = 9600,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS,
timeout=1
)
while True:
n = random.randint(1,9)
print("Writing", n)
ser.write(n)
time.sleep(1)
feedback = ser.read()
print(feedback) // Expecting 'X'
When i run the script, I see no output in the serial console as well as an empty message (b'') (Note the timeout parameter)
I have already enabled serial communication with raspi-config and restarted. When I list devices (ls -l /dev/), I can see:
lrwxrwxrwx 1 root root 5 Apr 28 20:21 serial0 -> ttyS0
lrwxrwxrwx 1 root root 7 Apr 28 20:21 serial1 -> ttyAMA0
As an additional test, I ran minicom -b 9600 -o -D /dev/ttyS0 with 1 wire connecting RX to TX on the pi, and it successfully echoed back.
Do I have a code issue, or possible hardware issue? Maybe since it is a teensy some different protocol is required? See here
I'm out of ideas as to why it isn't communicating correctly. Here is my wiring:
