This video just show how
MicroPython bluetooth module examples
run on ESP32-C3, Ai-Thinker NodeMCU ESP-C3-32S-Kit and Espressif
ESP32-C3-DevKitM-1, both running MicroPython
v1.19.1 on 2022-06-18. Finally, have bi-direction BLE communication between ESP32-C3 dev. boards.
MicroPython bluetooth module
provides an interface to a Bluetooth controller on a board. Currently this
supports Bluetooth Low Energy (BLE) in Central, Peripheral, Broadcaster, and
Observer roles, as well as GATT Server and Client and L2CAP
connection-oriented-channels. A device may operate in multiple roles
concurrently. Pairing (and bonding) is supported on some ports.
Refer to
ESP-C3-32S-Kit Specification, there are Cool, Warm and a three-in-one RGB lamp on board. - IO3
: RGB red lamp beads - IO4 : RGB green lamp beads - IO5
: RGB blue lamp beads - IO18 : Warm color lamp beads - IO19 : Cool
color lamp beads (high level is valid)
Exercise code:
mpy_NodeMCU_ESP-C3-32S-Kit_RGB.py, control onboard LEDs as
Digital Output.
"""
MicroPython/NodeMCU ESP-C3-32S-Kit exercise
to control RGB LED.
"""
import uos
import usys
from machine import Pin
import time
# NodeMCU ESP-C3-32S-Kit onboard LEDs assignment
pinR = Pin(3, Pin.OUT)
pinG = Pin(4, Pin.OUT)
pinB = Pin(5, Pin.OUT)
pinWarm = Pin(18, Pin.OUT)
pinCool = Pin(19, Pin.OUT)
print()
print("====================================")
print(usys.implementation[0], uos.uname()[3],
"\nrun on", uos.uname()[4])
print("====================================")
while True:
#All OFF
pinR.value(0)
pinG.value(0)
pinB.value(0)
pinWarm.value(0)
pinCool.value(0)
time.sleep(1)
#turn ON WARM
pinWarm.value(1)
time.sleep(1)
#turn ON COOL
pinWarm.value(0)
pinCool.value(1)
time.sleep(1)
#turn ON RED
pinCool.value(0)
pinR.value(1)
time.sleep(1)
#turn ON GREEN
pinR.value(0)
pinG.value(1)
time.sleep(1)
#turn ON BLUE
pinG.value(0)
pinB.value(1)
time.sleep(1)
#turn ON RED/GREEN/BLUE
pinR.value(1)
pinG.value(1)
pinB.value(1)
time.sleep(1)
mpy_NodeMCU_ESP-C3-32S-Kit_RGB_PWM.py, control onboard LEDs as
PWM.
"""
MicroPython/NodeMCU ESP-C3-32S-Kit exercise
to control RGB LED (PWM).
# ref:
# https://docs.micropython.org/en/latest/esp32/quickref.html#pwm-pulse-width-modulation
"""
import uos
import usys
import time
from machine import Pin, PWM
print()
print("====================================")
print(usys.implementation[0], uos.uname()[3],
"\nrun on", uos.uname()[4])
print("====================================")
time.sleep(1)
# NodeMCU ESP-C3-32S-Kit onboard LEDs assignment
pwmR = PWM(Pin(3))
pwmG = PWM(Pin(4))
pwmB = PWM(Pin(5))
pwmWarm = PWM(Pin(18))
pwmCool = PWM(Pin(19))
pwmR.freq(1000) # set PWM frequency from 1Hz to 40MHz
pwmG.freq(1000)
pwmB.freq(1000)
pwmWarm.freq(1000)
pwmCool.freq(1000)
def PWMLedTest(pwmpin):
for d in range(0, 1024):
pwmpin.duty(d)
time.sleep(0.005)
for d in range(1023, -1, -1):
pwmpin.duty(d)
time.sleep(0.005)
while True:
#All OFF
pwmR.duty(0)
pwmG.duty(0)
pwmB.duty(0)
pwmWarm.duty(0)
pwmCool.duty(0)
time.sleep(1)
PWMLedTest(pwmR)
time.sleep(0.5)
PWMLedTest(pwmG)
time.sleep(0.5)
PWMLedTest(pwmB)
time.sleep(0.5)
PWMLedTest(pwmCool)
time.sleep(0.5)
PWMLedTest(pwmWarm)
time.sleep(1)
Updated@2022-08-15 It's found that Cool and Warm LEDs
are mutual affected. It because Cool and Warm LEDs share a common
current limit resistors. And also, R, G and B share common current limit
resistors.
