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IchigoJam+BME280 (python)
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#coding: utf-8 | |
from flask import Flask, request | |
from bme280 import BME280 | |
app = Flask(__name__) | |
@app.route('/', methods=["POST"]) | |
def post(): | |
bme280 = BME280() | |
post_data = request.get_data().splitlines() | |
post_data = list(map(lambda x: int(x), post_data)) | |
ijid = post_data[0] | |
calib = post_data[1:1+32] | |
data = post_data[1+32:1+32+8] | |
bme280 = BME280() | |
bme280.setCalib(calib) | |
bme280.setData(data) | |
return 'done.' | |
if __name__ == '__main__': | |
app.run() |
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#coding utf-8 | |
# SWITCHSCIENCEのコードを流用してますので、MITライセンスの表示 | |
# https://github.com/SWITCHSCIENCE/samplecodes/blob/master/LICENSE | |
class BME280: | |
def __init__(self): | |
self.digT = [] | |
self.digP = [] | |
self.digH = [] | |
self.t_fine = 0.0 | |
def setCalib(self, calib): | |
self.digT.append((calib[1] << 8) | calib[0]) | |
self.digT.append((calib[3] << 8) | calib[2]) | |
self.digT.append((calib[3] << 8) | calib[2]) | |
self.digT.append((calib[5] << 8) | calib[4]) | |
self.digP.append((calib[7] << 8) | calib[6]) | |
self.digP.append((calib[9] << 8) | calib[8]) | |
self.digP.append((calib[11]<< 8) | calib[10]) | |
self.digP.append((calib[13]<< 8) | calib[12]) | |
self.digP.append((calib[15]<< 8) | calib[14]) | |
self.digP.append((calib[17]<< 8) | calib[16]) | |
self.digP.append((calib[19]<< 8) | calib[18]) | |
self.digP.append((calib[21]<< 8) | calib[20]) | |
self.digP.append((calib[23]<< 8) | calib[22]) | |
self.digH.append( calib[24] ) | |
self.digH.append((calib[26]<< 8) | calib[25]) | |
self.digH.append( calib[27] ) | |
self.digH.append((calib[28]<< 4) | (0x0F & calib[29])) | |
self.digH.append((calib[30]<< 4) | ((calib[29] >> 4) & 0x0F)) | |
self.digH.append( calib[31] ) | |
for i in range(1,2): | |
if self.digT[i] & 0x8000: | |
self.digT[i] = (-self.digT[i] ^ 0xFFFF) + 1 | |
for i in range(1,8): | |
if self.digP[i] & 0x8000: | |
self.digP[i] = (-self.digP[i] ^ 0xFFFF) + 1 | |
for i in range(0,6): | |
if self.digH[i] & 0x8000: | |
self.digH[i] = (-self.digH[i] ^ 0xFFFF) + 1 | |
def setData(self, data): | |
pres_raw = (data[0] << 12) | (data[1] << 4) | (data[2] >> 4) | |
temp_raw = (data[3] << 12) | (data[4] << 4) | (data[5] >> 4) | |
hum_raw = (data[6] << 8) | data[7] | |
self.compensate_T(temp_raw) | |
self.compensate_P(pres_raw) | |
self.compensate_H(hum_raw) | |
def compensate_P(self, adc_P): | |
pressure = 0.0 | |
v1 = (self.t_fine / 2.0) - 64000.0 | |
v2 = (((v1 / 4.0) * (v1 / 4.0)) / 2048) * self.digP[5] | |
v2 = v2 + ((v1 * self.digP[4]) * 2.0) | |
v2 = (v2 / 4.0) + (self.digP[3] * 65536.0) | |
v1 = (((self.digP[2] * (((v1 / 4.0) * (v1 / 4.0)) / 8192)) / 8) + ((self.digP[1] * v1) / 2.0)) / 262144 | |
v1 = ((32768 + v1) * self.digP[0]) / 32768 | |
if v1 == 0: | |
return 0 | |
pressure = ((1048576 - adc_P) - (v2 / 4096)) * 3125 | |
if pressure < 0x80000000: | |
pressure = (pressure * 2.0) / v1 | |
else: | |
pressure = (pressure / v1) * 2 | |
v1 = (self.digP[8] * (((pressure / 8.0) * (pressure / 8.0)) / 8192.0)) / 4096 | |
v2 = ((pressure / 4.0) * self.digP[7]) / 8192.0 | |
pressure = pressure + ((v1 + v2 + self.digP[6]) / 16.0) | |
print("pressure : %7.2f hPa" % (pressure/100)) | |
def compensate_T(self, adc_T): | |
v1 = (adc_T / 16384.0 - self.digT[0] / 1024.0) * self.digT[1] | |
v2 = (adc_T / 131072.0 - self.digT[0] / 8192.0) * (adc_T / 131072.0 - self.digT[0] / 8192.0) * self.digT[2] | |
self.t_fine = v1 + v2 | |
temperature = self.t_fine / 5120.0 | |
print("temp : %-6.2f ℃" % (temperature)) | |
def compensate_H(self, adc_H): | |
var_h = self.t_fine - 76800.0 | |
if var_h != 0: | |
var_h = (adc_H - (self.digH[3] * 64.0 + self.digH[4]/16384.0 * var_h)) * (self.digH[1] / 65536.0 * (1.0 + self.digH[5] / 67108864.0 * var_h * (1.0 + self.digH[2] / 67108864.0 * var_h))) | |
else: | |
return 0 | |
var_h = var_h * (1.0 - self.digH[0] * var_h / 524288.0) | |
if var_h > 100.0: | |
var_h = 100.0 | |
elif var_h < 0.0: | |
var_h = 0.0 | |
print("hum : %6.2f %" % (var_h)) |
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