2021-1-capstone-design1 / RIT_Project1

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Hyungsun Yoon
b4163544 1 parent b4a82776

[HW] HC-SR04 Added

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...@@ -5,6 +5,7 @@ import rp2 ...@@ -5,6 +5,7 @@ import rp2
5 import neopixel 5 import neopixel
6 import dht 6 import dht
7 import bluetoooth as bto 7 import bluetoooth as bto
8 +import ultrasonic
8 9
9 # --------------------------------------------------- # 10 # --------------------------------------------------- #
10 # INIT 11 # INIT
...@@ -33,6 +34,9 @@ def _run(): ...@@ -33,6 +34,9 @@ def _run():
33 send_string = str(dht_data[0]) + ',' + str(dht_data[1]) 34 send_string = str(dht_data[0]) + ',' + str(dht_data[1])
34 print(send_string) 35 print(send_string)
35 bto.send_data_bt(send_string) 36 bto.send_data_bt(send_string)
37 + elif input_data == 'C':
38 + ultasonic_data = ultrasonic.work_sr04()
39 + bto.send_data_bt(str(ultasonic_data))
36 else: 40 else:
37 print('WRONG INPUT') 41 print('WRONG INPUT')
38 42
......
1 +''' Original code from https://www.iottrends.tech/blog/how-to-use-ultrasonic-sensor-with-raspberry-pi-pico/
2 +'''
3 +from machine import Pin
4 +import utime
5 +trigger = Pin(26, Pin.OUT)
6 +echo = Pin(27, Pin.IN)
7 +
8 +# --------------------------------------------------- #
9 +# FUNCTIONS
10 +# --------------------------------------------------- #
11 +def work_sr04():
12 + trigger.low()
13 + utime.sleep_us(2)
14 + trigger.high()
15 + utime.sleep_us(5)
16 + trigger.low()
17 + while echo.value() == 0:
18 + signaloff = utime.ticks_us()
19 + while echo.value() == 1:
20 + signalon = utime.ticks_us()
21 + timepassed = signalon - signaloff
22 + distance = (timepassed * 0.0330) / 2
23 +
24 + return distance