STEAM init demo created: oled+wifi scan

Author: tomas-fryza

examples/40-fm-tuner-rda5807/_test_fm.py

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+"""
+FM radio & sensors
+
+This MicroPython script integrates an OLED display, FM radio module,
+rotary encoder, PIR motion sensor, and BMP180 pressure sensor. Key
+functionalities include controlling the FM radio's volume and frequency,
+displaying temperature and pressure data, motion detection with the PIR
+sensor, and updating the OLED display with real-time sensor readings.
+
+Authors:
+- Tomas Fryza
+- Ondrej Kolar
+
+Creation date: 2025-01-23
+Last modified: 2025-03-05
+
+Inspired by:
+FM RDA5807M
+  * https://101-things.readthedocs.io/en/latest/fm_radio.html
+  * https://github.com/franckinux/python-rd5807m/tree/master
+  * https://github.com/wagiminator/ATtiny85-TinyFMRadio/blob/master/software/TinyFMRadio.ino
+  * https://github.com/pu2clr/RDA5807/tree/master/examples
+
+Rotary Encoder
+  * https://techtotinker.com/2021/04/13/027-micropython-technotes-rotary-encoder/
+"""
+
+# Micropython builtin modules
+import time
+from machine import Pin, SoftI2C, RTC, PWM
+
+# External modules
+import ssd1306                    # OLED display
+from bmp180 import BMP180         # Pressure meter
+import rda5807                    # FM radio module
+from rotary_irq import RotaryIRQ  # Rotary encoder
+
+LED_PIN = 2
+BTN_UP_PIN = 19
+BTN_DOWN_PIN = 18
+ROT_PIN = 33
+ROT_CLK_PIN = 32
+ROT_DT_PIN = 35
+# BUZZ_PIN = 13
+PIR_PIN = 15
+
+
+def button_mute(pin):
+    global led, mute
+
+    led.on()
+    time.sleep_ms(20)
+    mute = not mute
+    radio.mute(mute)
+    print(f"Mute: {mute}")
+
+
+# Init I2C using pins 22 & 21 (default I2C pins)
+i2c = SoftI2C(sda=Pin(21), scl=Pin(22))  #, freq=400_000)
+print(f"I2C configuration : {str(i2c)}")
+
+# I2C devices
+display = ssd1306.SSD1306_I2C(128, 32, i2c)
+bmp180 = BMP180(i2c)
+radio = rda5807.Radio(i2c)
+time.sleep_ms(100)  # Let the radio initialize !!! Otherwise the module does not work !!!
+
+# Led & buttons
+led = Pin(LED_PIN, Pin.OUT)
+btn_up = Pin(BTN_UP_PIN, Pin.IN, Pin.PULL_UP)
+btn_down = Pin(BTN_DOWN_PIN, Pin.IN, Pin.PULL_UP)
+btn_rot = Pin(ROT_PIN, Pin.IN, Pin.PULL_UP)
+
+# Attach interrupt to the button pin (trigger on falling edge)
+btn_rot.irq(trigger=Pin.IRQ_FALLING, handler=button_mute)
+
+# Other devices
+# buzzer = PWM(Pin(BUZZ_PIN, Pin.OUT), duty=0)  # duty=0 prevents default waveform from starting immediately
+pir = Pin(PIR_PIN, Pin.IN)
+rot = RotaryIRQ(pin_num_clk=ROT_CLK_PIN,
+                pin_num_dt=ROT_DT_PIN,
+                min_val=0,
+                max_val=15,
+                pull_up=False,
+                half_step=True,
+                reverse=False,
+                range_mode=RotaryIRQ.RANGE_BOUNDED)
+
+# Set FM module
+vol = rot.value()
+mute = False
+radio_text = ""
+radio.set_volume(vol)           # 0--15
+radio.set_frequency_MHz(103.4)  # 103.4 - Blanik
+radio.mute(mute)
+
+print("\nStart using FM module and sensors. Press `Ctrl+C` to stop")
+
+try:
+    # Forever loop
+    while True:
+        # Clear display
+        display.fill(0)
+
+        # Volume 0--15
+        vol_new = rot.value()
+        if vol != vol_new:
+            vol = vol_new
+            radio.set_volume(vol)
+            print(f"Volume: {vol}")
+        display.text('vol: '+str(vol), 0, 16, 1)
+
+        # Buttons: seek frequency up, down, and mute
+        if (btn_up.value() == 0):
+            led.on()
+            radio.seek_up()
+        elif (btn_down.value() == 0):
+            led.on()
+            radio.seek_down()
+        else:
+            led.off()
+
+        # BMPT180: air temperature and pressure
+        pressure = f"{bmp180.pressure/100:.1f} hPa"
+        display.text(pressure, 60, 16, 1)
+        temperature = f"{bmp180.temperature:.1f} C"
+        display.text(temperature, 60, 24, 1)
+
+        # Passive infrared, motion detection
+        display.text('PIR: '+str(pir.value()), 0, 24, 1)
+
+        # FM Radio
+        radio.update_rds()
+        radio_name = "".join(map(str, radio.station_name))
+        display.text(str(radio_name), 0, 0, 1)
+
+        radio_text_new = "".join(map(str, radio.radio_text))
+        if radio_text != radio_text_new:
+            radio_text = radio_text_new
+            print(f"RDS text: {radio_text}")
+
+        display.text(str(radio.get_frequency_MHz())+' MHz', 0, 8, 1)
+
+        rssi = radio.get_signal_strength()
+        display.text(str(rssi)+' dBm', 85, 8, 1)
+
+        display.show()
+        time.sleep_ms(20)
+
+except KeyboardInterrupt:
+    # This part runs when Ctrl+C is pressed
+    print("\nProgram stopped. Exiting...")
+
+    # Optional cleanup code
+    led.off()
+    # buzzer.deinit()