From efbc25ff02184caf04c1d1ce7ce226e762510826 Mon Sep 17 00:00:00 2001 From: Kattni Rembor Date: Tue, 12 Nov 2019 13:37:00 -0500 Subject: [PATCH 1/2] Add error check, update for Pi --- adafruit_us100.py | 9 +++++++-- examples/us100_simpletest.py | 12 +++++++++--- 2 files changed, 16 insertions(+), 5 deletions(-) diff --git a/adafruit_us100.py b/adafruit_us100.py index cc981a1..79d4b46 100644 --- a/adafruit_us100.py +++ b/adafruit_us100.py @@ -37,11 +37,10 @@ https://github.com/adafruit/circuitpython/releases """ -# imports - __version__ = "0.0.0-auto.0" __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_US100.git" + class US100: """Control a US-100 ultrasonic range sensor.""" @@ -63,6 +62,9 @@ def distance(self): """ self._uart.write(bytes([0x55])) data = self._uart.read(2) # 2 bytes return for distance + if not data: + raise RuntimeError("Sensor not found. Check your wiring!") + if len(data) != 2: raise RuntimeError("Did not receive distance response") dist = (data[1] + (data[0] << 8)) / 10 @@ -73,6 +75,9 @@ def temperature(self): """Return the on-chip temperature, in Celsius""" self._uart.write(bytes([0x50])) data = self._uart.read(1) # 1 byte return for temp + if not data: + raise RuntimeError("Sensor not found. Check your wiring!") + if len(data) != 1: raise RuntimeError("Did not receive temperature response") temp = data[0] - 45 diff --git a/examples/us100_simpletest.py b/examples/us100_simpletest.py index a08ffb8..da2a600 100644 --- a/examples/us100_simpletest.py +++ b/examples/us100_simpletest.py @@ -1,14 +1,20 @@ import time -import board -import busio import adafruit_us100 +# For use with a microcontroller: +import board +import busio uart = busio.UART(board.TX, board.RX, baudrate=9600) -# Create a US-100 module instance. + +# For use with Raspberry Pi/Linux: +# import serial +# uart = serial.Serial("/dev/ttyS0", baudrate=9600, timeout=1) + us100 = adafruit_us100.US100(uart) while True: print("-----") print("Temperature: ", us100.temperature) + time.sleep(0.5) print("Distance: ", us100.distance) time.sleep(0.5) From 1bcc17720cfc3d9e8d5ca7830a3f71282f9d2aec Mon Sep 17 00:00:00 2001 From: Kattni Rembor Date: Tue, 12 Nov 2019 13:47:35 -0500 Subject: [PATCH 2/2] Lint. --- examples/us100_simpletest.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/examples/us100_simpletest.py b/examples/us100_simpletest.py index da2a600..b503e80 100644 --- a/examples/us100_simpletest.py +++ b/examples/us100_simpletest.py @@ -1,13 +1,14 @@ import time -import adafruit_us100 # For use with a microcontroller: import board import busio +import adafruit_us100 uart = busio.UART(board.TX, board.RX, baudrate=9600) # For use with Raspberry Pi/Linux: # import serial +# import adafruit_us100 # uart = serial.Serial("/dev/ttyS0", baudrate=9600, timeout=1) us100 = adafruit_us100.US100(uart)