Hello all,
I’m stuck again.
I’m running a python script (similar to code below) on Raspberry pi 3 to monitor power/current.
I’m using INA3221 similar to INA219 current monitor. I’m trying to figure out how to send data (like voltage) to Node js blynk client so I can attach it to virtual pin and display it in widget on blynk app.
Please share if there’s an easy method of doing this.
Thank you in advance.
#!/usr/bin/env python
#
# Test SDL_Pi_INA3221
# John C. Shovic, SwitchDoc Labs
# 03/05/2015
#
#
# imports
import sys
import time
import datetime
import random
import SDL_Pi_INA3221
# Main Program
print ""
print "Test SDL_Pi_INA3221 Version 1.0 - SwitchDoc Labs"
print ""
print "Sample uses 0x40 and SunAirPlus board INA3221"
print " Will work with the INA3221 SwitchDoc Labs Breakout Board"
print "Program Started at:"+ time.strftime("%Y-%m-%d %H:%M:%S")
print ""
filename = time.strftime("%Y-%m-%d%H:%M:%SRTCTest") + ".txt"
starttime = datetime.datetime.utcnow()
ina3221 = SDL_Pi_INA3221.SDL_Pi_INA3221(addr=0x40)
# the three channels of the INA3221 named for SunAirPlus Solar Power Controller channels (www.switchdoc.com)
LIPO_BATTERY_CHANNEL = 1
SOLAR_CELL_CHANNEL = 2
OUTPUT_CHANNEL = 3
while True:
print "------------------------------"
shuntvoltage1 = 0
busvoltage1 = 0
current_mA1 = 0
loadvoltage1 = 0
busvoltage1 = ina3221.getBusVoltage_V(LIPO_BATTERY_CHANNEL)
shuntvoltage1 = ina3221.getShuntVoltage_mV(LIPO_BATTERY_CHANNEL)
# minus is to get the "sense" right. - means the battery is charging, + that it is discharging
current_mA1 = ina3221.getCurrent_mA(LIPO_BATTERY_CHANNEL)
loadvoltage1 = busvoltage1 + (shuntvoltage1 / 1000)
print "LIPO_Battery Bus Voltage: %3.2f V " % busvoltage1
print "LIPO_Battery Shunt Voltage: %3.2f mV " % shuntvoltage1
print "LIPO_Battery Load Voltage: %3.2f V" % loadvoltage1
print "LIPO_Battery Current 1: %3.2f mA" % current_mA1
print
shuntvoltage2 = 0
busvoltage2 = 0
current_mA2 = 0
loadvoltage2 = 0
busvoltage2 = ina3221.getBusVoltage_V(SOLAR_CELL_CHANNEL)
shuntvoltage2 = ina3221.getShuntVoltage_mV(SOLAR_CELL_CHANNEL)
current_mA2 = -ina3221.getCurrent_mA(SOLAR_CELL_CHANNEL)
loadvoltage2 = busvoltage2 + (shuntvoltage2 / 1000)
print "Solar Cell Bus Voltage 2: %3.2f V " % busvoltage2
print "Solar Cell Shunt Voltage 2: %3.2f mV " % shuntvoltage2
print "Solar Cell Load Voltage 2: %3.2f V" % loadvoltage2
print "Solar Cell Current 2: %3.2f mA" % current_mA2
print
shuntvoltage3 = 0
busvoltage3 = 0
current_mA3 = 0
loadvoltage3 = 0
busvoltage3 = ina3221.getBusVoltage_V(OUTPUT_CHANNEL)
shuntvoltage3 = ina3221.getShuntVoltage_mV(OUTPUT_CHANNEL)
current_mA3 = ina3221.getCurrent_mA(OUTPUT_CHANNEL)
loadvoltage3 = busvoltage3 + (shuntvoltage3 / 1000)
print "Output Bus Voltage 3: %3.2f V " % busvoltage3
print "Output Shunt Voltage 3: %3.2f mV " % shuntvoltage3
print "Output Load Voltage 3: %3.2f V" % loadvoltage3
print "Output Current 3: %3.2f mA" % current_mA3
print
#
time.sleep(2.0)
