S
@freddy I have some Pysense code to send almost all of it over LoRa. Might be useful as a starting point. It is on GitHub at
https://github.com/smbunn/FiPy in the python program 'sense.py' and the latest copy is pasted below.
# See https://docs.pycom.io for more information regarding library specifics
from network import LoRa
#import config
from pysense import Pysense
from LIS2HH12 import LIS2HH12
from SI7006A20 import SI7006A20
from LTR329ALS01 import LTR329ALS01
from MPL3115A2 import MPL3115A2,ALTITUDE,PRESSURE
import time # import library for delay times
import pycom
import socket
import binascii
import struct
import ujson
# Colors
off = 0x000000
red = 0xff0000
green = 0x00ff00
blue = 0x0000ff
yellow = 0xffff00
# Initialize LoRa in LORAWAN mode.
lora = LoRa(mode=LoRa.LORAWAN)
# Set up KotahiNet channels
lora.add_channel(0, frequency=864862500, dr_min=0, dr_max=5)
lora.add_channel(1, frequency=865062500, dr_min=0, dr_max=5)
lora.add_channel(2, frequency=865402500, dr_min=0, dr_max=5)
lora.add_channel(3, frequency=865602500, dr_min=0, dr_max=5)
lora.add_channel(4, frequency=865985000, dr_min=0, dr_max=5)
lora.add_channel(5, frequency=866200000, dr_min=0, dr_max=5)
lora.add_channel(6, frequency=866400000, dr_min=0, dr_max=5)
lora.add_channel(7, frequency=866600000, dr_min=0, dr_max=5)
# Turn off hearbeat LED
pycom.heartbeat(False)
# create an ABP authentication params
dev_addr = struct.unpack(">l", binascii.unhexlify('00 70 C3 4D'.replace(' ','')))[0]
nwk_swkey = binascii.unhexlify('1BFE9C81AD35B39019244D155CE31D88'.replace(' ',''))
app_swkey = binascii.unhexlify('045ABBEFE974D3E257AC31522E8E837B'.replace(' ',''))
# join a network using ABP (Activation By Personalization)
lora.join(activation=LoRa.ABP, auth=(dev_addr, nwk_swkey, app_swkey))
# create a LoRa socket
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
# set the LoRaWAN data rate
s.setsockopt(socket.SOL_LORA, socket.SO_DR, 0)
# Builds the bytearray to send the request
py = Pysense()
si = SI7006A20(py)
lt = LTR329ALS01(py)
li = LIS2HH12(py)
for count in range (2000):
print("Count=", count)
vt = py.read_battery_voltage()
print("Battery voltage: " +str(vt))
dew = si.dew_point()
print("Dew point: "+ str(dew) + " deg C")
mp = MPL3115A2(py,mode=ALTITUDE) # Returns height in meters. Mode may also be set to PRESSURE, returning a value in Pascals
print("MPL3115A2 temperature: " + str(mp.temperature()))
temp1 = mp.temperature()
alt1 = mp.altitude()+100.0
print("Altitude: " + str(alt1))
mpp = MPL3115A2(py,mode=PRESSURE) # Returns pressure in Pa. Mode may also be set to ALTITUDE, returning a value in meters
press1 = mpp.pressure()
print("Pressure: " + str(press1)) #Pressure does not work too well
temp2 = si.temperature()
hum1 = si.humidity()
print("Temperature: " + str(temp2)+ " deg C and Relative Humidity: " + str(hum1) + " %RH")
t_ambient = 24.4
relhum = si.humid_ambient(t_ambient)
print("Humidity Ambient for " + str(t_ambient) + " deg C is " + str(relhum) + "%RH")
print("Light (channel Blue lux, channel Red lux): " + str(lt.light()))
acct = li.acceleration()
acc1 = acct[0]
acc2 = acct[1]
acc3 = acct[2]
roll1 = li.roll()
pitch1 = li.pitch()
print("Acceleration: " + str(acc1))
print("Roll: " + str(roll1))
print("Pitch: " + str(pitch1))
# Flash the light every time a payload is sent
pycom.rgbled(blue)
time.sleep(0.5)
pycom.rgbled(off)
time.sleep(0.5)
pycom.rgbled(red)
time.sleep(0.5)
pycom.rgbled(off)
data = bytearray(48)
data[0:4] = bytearray(struct.pack(">i", count))
data[4:8] = bytearray(struct.pack(">f", vt))
data[8:12] = bytearray(struct.pack(">f", dew))
data[12:16] = bytearray(struct.pack(">f", temp1))
data[16:20] = bytearray(struct.pack(">f", alt1))
data[20:24] = bytearray(struct.pack(">f", press1))
data[24:28] = bytearray(struct.pack(">f", temp2))
data[28:32] = bytearray(struct.pack(">f", hum1))
data[32:36] = bytearray(struct.pack(">f", relhum))
data[36:40] = bytearray(struct.pack(">f", acc1))
data[40:44] = bytearray(struct.pack(">f", acc2))
data[44:48] = bytearray(struct.pack(">f", acc3))
# data[48:52] = bytearray(struct.pack(">f", roll1))
# data[52:56] = bytearray(struct.pack(">f", pitch1))
print ('Data = ',count,vt,dew, temp1, alt1, press1, temp2, hum1, relhum, acc1, acc2, acc3, roll1, pitch1 )
s.setblocking(True)
s.send(data) # send buffer to AWS
print('data sent')
time.sleep(0.5)
# get any data received&
s.setblocking(False)
data = s.recv(64)
time.sleep(0.5)
print(data) #anything received?time.sleep(20) # wait time between packets sent
time.sleep(59)
Note : I had to comment out the last two float values for roll and pitch as you are limited to 51 bytes when using SF12.
The Git Hub has my Node--Red implementation which decodes the payload.
Simon
