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ESP8266 Micropython driver version #2

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ESP8266 Micropython driver version #2

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b38f449
ESP8266 driver version
seastate Dec 20, 2021
4eb11d3
Add example to script
seastate Dec 20, 2021
5925188
Merge pull request #1 from seastate/esp8266
seastate Dec 20, 2021
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178 changes: 178 additions & 0 deletions Python/si1132.py
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# Distributed with a free-will license.
# Use it any way you want, profit or free, provided it fits in the licenses of its associated works.
# si1132
#This code is modified from https://github.com/ControlEverythingCommunity/SI1132 to work with micropython on
#an ESP8266 microcontroller using emulated SMBus from https://github.com/gkluoe/micropython-smbus.
#It is untested but should work on a variety of other platforms, provided a valid SMBus object is passed to it.
#
#Example:
#>>>from machine import Pin
#>>>from usmbus import SMBus
#>>>from si1132 import SI1132
#>>>bus = SMBus(scl=Pin(5, Pin.IN),sda=Pin(4, Pin.IN))
#>>>sensor = SI1132(smbus=bus)
#>>>sensor.read()

import time
from machine import Pin

class SI1132:
def __init__(
self,
smbus=None):
self.bus = smbus

def read(self):
# SI1132 address, 0x60(96)
# Enable UVindex measurement coefficients
self.bus.write_byte_data(0x60, 0x13, 0x29)
self.bus.write_byte_data(0x60, 0x14, 0x89)
self.bus.write_byte_data(0x60, 0x15, 0x02)
self.bus.write_byte_data(0x60, 0x16, 0x00)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0xF0(15) Enable UV, Visible, IR
self.bus.write_byte_data(0x60, 0x17, 0xF0)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x01 | 0xA0(161) Select CHLIST register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x01 | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select INT Output Enable register, 0x03(03)
# 0x01(01) INT pin driven low
self.bus.write_byte_data(0x60, 0x03, 0x01)
# SI1132 address, 0x60(96)
# Select ALS Interrupt Enable register, 0x04(04)
# 0x01(01) Assert INT pin whenever VIS or UV measurements are ready
self.bus.write_byte_data(0x60, 0x04, 0x01)
# SI1132 address, 0x60(96)
# Select HW_KEY register, 0x07(07)
# 0x17(23) Default value
self.bus.write_byte_data(0x60, 0x07, 0x17)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0x00(0) Small IR photodiode
self.bus.write_byte_data(0x60, 0x17, 0x00)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x0E | 0xA0(174) Select ALS_IR_ADCMUX register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x0E | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0x00(0) Set ADC Clock divided / 1
self.bus.write_byte_data(0x60, 0x17, 0x00)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x1E | 0xA0(190) Select ALS_IR_ADC_GAIN register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x1E | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0x70(112) Set 511 ADC Clock
self.bus.write_byte_data(0x60, 0x17, 0x70)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x1D | 0xA0(189) Select ALS_IR_ADC_COUNTER register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x1D | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0x00(0) Set ADC Clock divided / 1
self.bus.write_byte_data(0x60, 0x17, 0x00)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x11 | 0xA0(177) Select ALS_VIS_ADC_GAIN register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x11 | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0x20(32) High Signal Range
self.bus.write_byte_data(0x60, 0x17, 0x20)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x1F | 0xA0(191) Select ALS_IR_ADC_MISC register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x1F | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0x70(112) Set 511 ADC Clock
self.bus.write_byte_data(0x60, 0x17, 0x70)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x10 | 0xA0(176) Select ALS_VIS_ADC_COUNTER register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x10 | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select PARAM_WR register, 0x17(23)
# 0x20(32) High Signal Range
self.bus.write_byte_data(0x60, 0x17, 0x20)
# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x12 | 0xA0(178) Select ALS_VIS_ADC_MISC register in RAM
self.bus.write_byte_data(0x60, 0x18, (0x12 | 0xA0))
time.sleep(0.01)
# SI1132 address, 0x60(96)
# Read data back from 0x2E(46), 1 byte
response = self.bus.read_byte_data(0x60, 0x2E)

# SI1132 address, 0x60(96)
# Select COMMAND register, 0x18(24)
# 0x0E(14) Start ALS conversion
self.bus.write_byte_data(0x60, 0x18, 0x0E)
time.sleep(0.5)

# SI1132 address, 0x60(96)
# Read data back from 0x22(34), 4 bytes
# visible lsb, visible msb, ir lsb, ir msb
data = self.bus.read_i2c_block_data(0x60, 0x22, 4)

# Convert the data
visible = data[1] * 256 + data[0]
ir = data[3] * 256 + data[2]

# SI1132 address, 0x60(96)
# Read data back from 0x2C(44), 2 bytes
# uv lsb, uv msb
data = self.bus.read_i2c_block_data(0x60, 0x2C, 2)

# Convert the data
uv = data[1] * 256 + data[0]

# Output data to screen
#print("Visible Light of Source : %d lux" %visible)
#print("IR Of Source : %d lux" %ir)
#print("UV Of the Source : %d lux" %uv)
print('si1132 uv, ir, visible = %d, %d, %d lux' % (uv, ir, visible))
return uv, ir, visible