LarsBergqvist’s gists

LarsBergqvist / measurecputemp.py

Created February 1, 2017 18:15

Measure the CPU temperature on a Raspberry Pi and publish the data with MQTT

	#!/usr/bin/env python3
	import paho.mqtt.publish as publish
	from subprocess import check_output
	from re import findall

	def get_temp():
	temp = check_output(["vcgencmd","measure_temp"]).decode("UTF-8")
	return(findall("\d+\.\d+",temp)[0])

	def publish_message(topic, message):

LarsBergqvist / printcputemp.py

Created February 1, 2017 18:13

Print the CPU temperature on a Raspberry Pi

	#!/usr/bin/env python3
	from subprocess import check_output
	from re import findall

	def get_temp():
	temp = check_output(["vcgencmd","measure_temp"]).decode("UTF-8")
	return(findall("\d+\.\d+",temp)[0])

	print(get_temp())

LarsBergqvist / bot.py

Last active December 15, 2016 07:34

A MicroPython car bot

	"""
	A bot with servos for an Adafruit Feather Huzzah
	Requires the Adafruit PWM servo library:
	https://github.com/adafruit/Adafruit-PWM-Servo-Driver-Library
	Uses a FeatherWing servo board attached with i2C
	"""
	import machine
	import servo
	import utime

LarsBergqvist / servo_wheels.py

Last active December 15, 2016 14:31

servo_wheels.py

	def stop():
	"""Stops the wheels"""
	servos.position(left_wheel, degrees=90)
	servos.position(right_wheel, degrees=90)

	def fw_step():
	"""Moves the bot forward one step"""
	servos.position(left_wheel, degrees=90 + wheel_speed)
	servos.position(right_wheel, degrees=90 - wheel_speed + drift)
	utime.sleep(straight_length)

LarsBergqvist / execute_sequence.py

Last active December 15, 2016 14:31

Call functions according to mappings between characters and objects' functions

LarsBergqvist / mqtt_oled.py

Last active December 3, 2016 20:52

mqtt_oled.py

	from umqtt.simple import MQTTClient
	import utime
	from machine import Pin
	import oled_message_display
	import wifi_connection

	last_messages = {}

	def mqtt_message_received(topic, msg):
	# add or update the latest stored message for this topic

LarsBergqvist / ssd1306_library_with_text.py

Created December 3, 2016 20:00

Example on text output on a 128x32 SSD1306 OLED display

	import machine
	i2c = machine.I2C(machine.Pin(5), machine.Pin(4))
	import ssd1306
	oled = ssd1306.SSD1306_I2C(128, 32, i2c)

	oled.fill(0)
	oled.text("First line", 0, 0)
	oled.text("Second line", 0, 10)
	oled.text("Third line", 0, 20)
	oled.show()

LarsBergqvist / umqtt_subscription.py

Last active December 3, 2016 18:17

umqtt example in MicroPython

	from umqtt.simple import MQTTClient
	import utime

	c = MQTTClient("umqtt_client", "192.168.1.16",port=1883)
	c.set_callback(mqtt_message_received)
	c.connect()
	c.subscribe("Home/#")

	while True:
	c.check_msg()

LarsBergqvist / wifi_connection.py

Created December 3, 2016 17:56

Basic network setup with ESP8266 and MicroPython

	import network
	import utime

	def setup_wifi():
	sta_if = network.WLAN(network.STA_IF)
	sta_if.active(True)
	# Replace with your SSID and WiFi password
	sta_if.connect('SSID', 'PASSWORD')
	while not sta_if.isconnected():
	utime.sleep(1)

LarsBergqvist / crontab.sh

Last active November 3, 2016 12:24

crontab file for automatically turning remote controlled outlets on/off

	# Turn on outdoor lights in the afternoon
	00 17 * * * curl -i -H "Content-Type: application/json" -X PUT -d '{"state":"on"}' http://localhost:5000/Outlets/api/outlets/2/1

	# Turn off outdoor lights in the morning
	00 08 * * * curl -i -H "Content-Type: application/json" -X PUT -d '{"state":"off"}' http://localhost:5000/Outlets/api/outlets/2/1

	# Turn on downstairs window lights in the afternoon
	30 19 * * * curl -i -H "Content-Type: application/json" -X PUT -d '{"state":"on"}' http://localhost:5000/Outlets/api/outlets/1/2

	# Turn on upstairs window lights in the evening

Lars Bergqvist LarsBergqvist