![]() They can check the battery status on their smartphones or Computer dashboards from anywhere in the world. But now due to the use of the Internet of Things, we can directly notify the users remotely. This ensures the safety and proper handling of Lithium-Ion or Lithium Polymer batteries.Įarlier BMS only monitors the condition of the battery and alarms the user via a battery indicator. ![]() The BMS monitors all the properties of the battery like the voltage, current, temperature & auto cut-off system. Most of the electrical/electronics devices has a separate system called Battery Management System (BMS). So, it is important to monitor the voltage level of the battery as improper or excess charging/discharging may lead to damage to the Battery or System Failure. In this project, we will build an IoT based Battery Monitoring System using ESP8266 where you can monitor the battery charging/discharging status along with Battery Voltage & Percentage.Īs we know, the battery is the most important component for any device as it powers the entire system. So it is clear that due to pins being shared with the wifi chip, it is not possible to measure VSYS using GPIO29+GPIO25.Overview: IoT Based Battery Monitoring System using ESP8266 Only when an SPI transaction isn’t in progress is it suitable to check for IRQs. When there isn’t an SPI transaction in progress can VSYS be read via the ADC. The CLK is shared with VSYS monitor, so only WL_GPIO2 IP VBUS sense - high if VBUS is present, else lowĭue to pin limitations, some of the wireless interface pins are shared. GPIO25 OP wireless SPI CS - when high also enables GPIO29 ADC pin to read VSYS `GPIO29 OP/IP wireless SPI CLK/ADC mode (ADC3) to measure VSYS/3 I am trying to accomplish this using the SDK. I also looked on this forum thread where others also struggle with doing this with python in combination with using WIFI. There is a micropython example (), but I found that this also does not work for Pico W. I am also trying to check battery status from time to time to get an idea when charging is needed. I am trying to run it on batte … ries, measure some sensors and submit the data via wifi. I have a setup with Pico W + pimoroni lipo shim. If charging.value() = 1: # if it's plugged into USB power.ĭisplay.text("Charging!", 15, 55, 240, 4)Įlse: # if not, display the battery statsĭisplay.text('%'.format(percentage), 15, 50, 240, 5) Percentage = 100 * ((voltage - empty_battery) / (full_battery - empty_battery))ĭisplay.rectangle(5, 5, round(210 / 100 * percentage), 125) Voltage = vsys.read_u16() * conversion_factor # convert the raw ADC read into a voltage, and then a percentage # Create some pen colours for drawing with Vsys = ADC(29)# reads the system input voltageĬharging = Pin('WL_GPIO2', Pin.IN) # reading GP24 tells us whether or not USB power is connectedįull_battery = 4.2 # these are our reference voltages for a full/empty battery, in voltsĮmpty_battery = 2.4 # the values could vary by battery size/manufacturer so you might need to adjust them Pin(25, mode=Pin.OUT, pull=Pin.PULL_DOWN).high() ![]() # change to DISPLAY_PICO_DISPLAY_2 for Pico Display 2.0įrom picographics import PicoGraphics, DISPLAY_PICO_DISPLAYĭisplay = PicoGraphics(display=DISPLAY_PICO_DISPLAY, rotate=0) # Remember to save this code as main.py on your Pico if you want it to run automatically! # It then displays the info on the screen of Pico Display. # and uses this reading to calculate how much charge is left in the battery. So currently the script I have is this # This example shows how to read the voltage from a LiPo battery connected to a Raspberry Pi Pico via our Pico Lipo SHIM GitHub … but it doesn’t seem to work for a pico w.It’s basically the script you have put together here pimoroni-pico/battery_pico.py at main ![]() The complete script I am running should display the charging voltage and battery level, or a ‘charging!’ status when it is plugged in. That works, but now that I am using your fix for usb detection it has stopped working. ![]() In theory I should be able to use Pin29 however this shows a very weird voltage (0.04V should be 3-4v), however after some googling it appears that pulling pin25 high corrects this Pin(25, mode=Pin.OUT, pull=Pin.PULL_DOWN).high() I’m also trying to read the voltage input when the pico w is not plugged in via usb. So my script is working correctly now and picking up the charging status…brilliant Fantastic!! thank you so much, I was searching everywhere for this! ![]()
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