LAX18 Development
56 lines
1.3 KiB
Python
56 lines
1.3 KiB
Python
#!/usr/bin/env python
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import struct
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import smbus
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import sys
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import time
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import json
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import sched
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import RPi.GPIO as GPIO
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bus = smbus.SMBus(1) # 0 = /dev/i2c-0 (port I2C0), 1 = /dev/i2c-1 (port I2C1)
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data = {}
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s = sched.scheduler(time.time, time.sleep)
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GPIO.setmode(GPIO.BCM)
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GPIO.setup(6, GPIO.IN)
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def readVoltage(bus):
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address = 0x36
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read = bus.read_word_data(address, 2)
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swapped = struct.unpack("<H", struct.pack(">H", read))[0]
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voltage = swapped * 1.25 /1000/16
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return voltage
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def readCapacity(bus):
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address = 0x36
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read = bus.read_word_data(address, 4)
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swapped = struct.unpack("<H", struct.pack(">H", read))[0]
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capacity = swapped/256
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return capacity
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def writeJSON():
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capacity = readCapacity(bus)
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voltage = readVoltage(bus)
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if GPIO.input(6):
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# Power Adapter plugged in
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adapter = "out"
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else:
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# Power Adapter NOT plugged in
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adapter = "in"
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data['percentage'] = []
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data['percentage'].append({
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'level': capacity,
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'voltage': voltage
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})
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data['adapter'] = []
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data['adapter'].append({
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'status': adapter
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})
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with open('/run/dump1090-mutability/battery.json', 'w') as outfile:
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json.dump(data, outfile)
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while True:
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s.enterabs(10, 1, writeJSON, ())
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s.run()
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