In previous posts (UFO has Landed and DIMM the OOD), I started playing with the CBiSEducation's UFO consumable robots. Still using the Micro:Bit, in this two part post series, I am going to be playing with using Micropython to send messages between the two kits.
Stage 1 Wiring and Set up-UFO
Pins 0 and 1 are outputs to the LEDs
The black leads on the UFO go to GND.
Micropython, using the Micro:Bit's built in radio module (Bluetooth), is used to communication between the two kits.
Stage 2 Code -UFO
The code is set to flash the UFO's LEDs and then scroll a message "DIMM Calling" when it receives a message "dimm" via Bluetooth.
Basic overview is
- Turn on the radio module - radio.on()
- If the message is received then turn the LEDs on and off and scrolls "DIMM calling" across the LED array.
- send a message via bluetooth "ufo" to whoever is listening (in the end the robot DIMM hopefully). The code is shown below.
from microbit import pin0, pin1, display, sleep
incoming = radio.receive()
if incoming == 'dimm':
To use the radio module you will need to switch to the mu editor (http://codewith.mu/).
Stage 3 Testing it
To test it, a second Micro:bit was used to send test signals (the code for this is shown below). When button A is pressed on the second Micro:Bit a message 'dimm' is sent followed by sending 'not'.
from microbit import button_a, button_b, sleep
The UFO does cycle through the sequence LEDs flash and the message scrolls. The slight bug is in repeats it several times before it stops; possibly a buffering issue somewhere.
In the next post (http://bit.ly/2d3zlh0), I will be building the Robot DIMM part of the system - sending and receiving message and detecting light levels in micropython.
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