water flow sensor micropython

Press Esc to cancel. I've never used a 1-wire thermometer, but if it keeps giving you trouble you could try a thermistor in a wheatstone bridge. So, put the switch on the TTL converter to "UART" position. Next step is to install Domoticz server on your PC. Raspberry Pi vs. Arduino: Which One is Best (for Beginners)? There is no one way only issue for most anything. I connect it to a FiPy via I2C then forward the readings to my server over MQTT. So the idea is to use one ESP like a hub for connecting other ESPs. Had to add a potentiometer just so I could continuously calibrate these things. Using the example of OpenHAB, this is particularly easy, since a lot is already included. The sound travels through the air. 1. For example did they start providing inaccurate readings or just stop working/not return any value? Choose WiFi network you are going to use, type in password, hit "Submit". After ESP starts, find a new WiFi network called "Wifimanager". To use them like standalone controllers we need to erase factory firmware and install a new one. All that is needed for this is a persistence layer (database in which the values are stored). it is so, because of as soon as you will upload main.py - ESP8266 module will reboot and start executing main.py file. Double micro-switch ON-OFF. User will have to push a button, and the battery level will be shown. Love data! Running ahead a little bit, I will say that I tried Pushover, Pushsafer and Pushbullet. It is powerful enough for running Domoticz server. If you believe that you will check some check boxes and it will work, you are wrong :) It doesn't work in this way. Maximum current:15 mA(DC 5V) # Pulse frequency (Hz) = 7.5Q, Q is flow rate in L/min. Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. She was afraid that the hose in the boiler room can be leaky, and the water would flood the newly laid wooden floor. This is the unique reference to this device and we need it later in our Python script to address notification. This topic has been deleted. I think in the next generation of this sensor there will a special button for testing battery charge. We need to use "Events" from "Setup" drop-down menu. I am using Adafruit MicroPython Tool (ampy) for this. USB to ESP8266 ESP-01 Wi-Fi Adapter Module w/ CH340G Driver. If not, you would most likely damage the pin. It was obvious without a phone alert. Second line is for testing - it shorts circuit without water, just to let us know is the device working or not. Ok, now we are ready for uploading the micropython scripts to ESP8266. So in this case if you try to upload another file, sometimes upload process will be failed. So I wanted to share my code - I think this can be such a useful device/project. Depending on the project, you will be using a few other hardware parts. In principle, any other free GPIO pin can also be used:Raspberry Pi GPIO Pin Assignment. I suspect that there is an issue with permissions. If you are interested you can visit this website: https://iconprocon.com/product-category/flow-meters/. Next ESP switches on, and sends a message to Domoticz server. I did a similar thing with a microcontroller and a flow sensor to monitor the flow rate of the coolant in my laser cutter. 5. Hit "enter". It means that file have been uploaded. This works for me on Windows machine perfectly. The Domoticz application supports many hardware devices natively. If you water your beds, you definitely want to know how much water has flowed over time. In this tutorial, however, we will limit ourselves to reading out the sensor and will therefore only assume the parts that are absolutely necessary. The values can then be sent to a predefined channel via MQTT (information on this here). Housing7. We will need to upload files: In command line type: ampy --port COM5 put C:\path to your file. I have tried several bits of code to try and read data off the sensor, but I am having trouble getting anything to work or be useable. BorisV2, please don't take my common the wrong way. In our case to read our flood sensor we need to add so called "Dummy" hardware from the list of hardware. So, take your RPi and install operating system suitable for running Domoticz server. The advantage of using 1st way, is that it is more flexible. Battery.I am using 3,7V Li-ion 400mAh battery. I am using Raspbian Stretch with Desktop from here: https://www.raspberrypi.org/downloads/raspbian/. Domoticz setup, Now that our server is ready, we can access it from any web browser, including from a tablet by entering the following URL: http://IP_domoticz:8080, Now that our server is ready, we can access it from any web browser, including from a tablet by entering the following URL: http://IP_domoticz:8080. Exactly the kind of project I am able to try out as a new python learner. Tried it with the pump on, but it starts building pressure, max, later on less flow, so not sure how I can fine tune this. You can use instructions here or here :). Fill in name of the device, and click "add". 3. Now all that remains is the connection of the hoses. If API key is correct, you should get a test notifications to your cell phone. After few seconds you should see empty command line. We need this module to reduce voltage from the battery to the acceptable level for ESP8266. Also, you have to be careful when connecting the signal of the sensor into the GPy, because the sensor will output a square wave between 0 and Vss, where Vss is the supply voltage for the sensor (5V for example). Im using your script for my flow meter, but I cant find the pulse frequence.> flow = (count / 7.5) # Pulse frequency (Hz) = 7.5Q, Q is flow rate in L/min. Subscribe to Raspberry Pi Tutorials and don't miss any new Tutorial! Here you can connect your ESP to local WiFi network. 3 years ago, Yes, in case you do not need to get notifications on your phone :). The GPy's pins can only receive an input of up to 3.3 VDC, so you will need a voltage divider prior to your input pin to bring the voltage down. Domoticz server installed on Raspberry Pi (or common PC under Windows or Linux). You can check the port where ESP is installed from Control panel - System - Device manager. One line serves to switch the device on. 1. This power module based on HT7333 chip, converts voltage to stable 3.3V for ESP8266. If I read it using pulses_get I cam able to get occasional sets of data, but not consistently. We need the tap connector for the flow meter, which we can best print ourselves: If you are using a different Raspberry Pi Water Flow Sensor, then pay attention to the description. Will you be plugged into city utilities or have your own tank? If you have the same converter as me, then by itself you need to change the switch to the "Prog" position. After entering data in the fields, you have to save them by pressing the red button "Apply Settings". Ampy installed, for flashing your program, 4. After clicking "Events" you can create your own event. Working voltage range:DC 5-24 V In the end I really just need to port over what is happening in the Arduino code over to MicroPython to run on the Gpy. I think I will try to use ESP-Now technology, which lets me connect several ESPs directly. Reply I am using Pycharm / Atom or Anaconda Spyder On raspberry Pi, 5. Corresponding lines are commented out in the code example above. MQTT is very suitable for this, as we can communicate via an interface. So just switch on those, you want to use. I would think the flow meter just sends an output every full rotation. 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Connect to it with your PC or phone, then go to IP address 192.168.4.1.. In our case notifications has to be send as soon as water was detected by the sensor. This on below isn't mine, but it's ok to illustrate. Depending on the data sheet and implementation, values per pulse frequency (Hz) of 7.5Q are found, with Q indicating the flow rate in litres/min. That means 7.5Hz = 1L/min. I used the same sensor with an arduino and some other hardware to make a sprinkler system that detected leaks for a project in school. A subreddit for discussing the Raspberry Pi ARM computer and all things related to it. All files for this project are available from here: https://bitbucket.org/pilotlt/floodsensor/src/mas if everything is ok, restart the module, by reinserting the TTL converter to USB port of your PC. You can check list of files on ESP by ampy command: From my experience it is better to upload main.py after you have uploaded all necessary files. So it is good for saving charge of the battery. As a result, your viewing experience will be diminished, and you may not be able to execute some actions. As per the device's datasheet, the minimum working voltage for your sensor is 4.5 VDC, so I don't think it would work with it connected to 3.3 VDC. But I did not succeed with this on Raspbian on my Raspberry Pi. some code, some tip, some info? Sending notification took up to 10 seconds: connection to WiFi, sending notification, getting alarm message to your phone. While I am sure your project accomplishes what you designed it to do, and it works like you planned using a micro-controller approach, a very simple two transistor circuit can work just as well and without any programming or daisy chaining of little PC assemblies. Thumbs Up! And also this software do not allow to use modules like standalone controllers. Than if conditions for triggering an event ( sending notification to you cell phone) is satisfied, Domoticz sends the notification. Do not be afraid, it is not so difficult. To do this you need TTL converter + few additional components. Vua lia! This an app with user interface, allowing to upload files to ESP modules. I started by trying to program event on the /device/ page. The device stands in off state until water shorts "Water sensor" pins. I've only had one leak in my entire life time, and I didn't need any phone to tell me about it. 18650 battery is a good choice also. Fun project to program and play with. The idea was to be notified remotely if water leaks. Last but not least, it would be advisable to set the Python script to autostart so that it sends data regularly. Find where esptool is installed (normally somewhere like C:\Program Files (x86)\Python36-32\Scripts. Now we can proceed to assembling all parts together, according to the block diagram below. To make it work faster. 6. But there is an easier way :). You can do it buy writing a code in Python or LUA, or just by using thing called "Blockly".I choosed to use Blockly. I have a Gpy with expansion board V3.1. :$. :) It works. I have programmed the sensor to send alarms every 30s, if water was detected. According to the spec sheet on the website: Frequency: F=7.5 * Q (L / Min) error: 2% current can not exceed 10mA, 450 output pulses/liters, F=Constant * units of flow (L / min) * time (seconds) This code looks great but my lack of understanding things still has kept me from being able to actually run it and print back any values. Navigate to menu "Utilities" and your device should be listed there. Seems like a good option since the flow processor will keep totalizing if your LoPy restarts. I was only stating how easy a simply leak detector can be made. Click this button and choose Sensor Type "Alert".Now we have to add the device in Domoticz to become active. 2.Use "Send notification with subject" message. From my 15 years of experience as an medical engineer, I know that easiest way of detecting water is metal pins shorted by water. Enable the device by clicking green arrow on the left (on my picture below it is blue, because of the device enabed). Hardware can be disabled or deleted. document.getElementById("comment").setAttribute("id","a449a099841c4244dc0c1c18be9c55c4");document.getElementById("jc72354ab5").setAttribute("id","comment"); Save my name, email, and website in this browser for the next time I comment. Any code editor you want. This value can deviate (in the linked data sheet it is more like 8-8.2 Hz) and should be adjusted accordingly. So .7 liters would be about 3 cups so instead of 200 rotations per cup (for my project) it would be about 330. Install firmware (I took it from here: https://micropython.org/download#esp8266) by typing: python esptool.exe --port COM5 --baud 460800 write_flash --flash_size=detect 0 C:\path_to_firmware\esp8266-20180511-v1.9.4.bin. When you are choosing a battery keep in mind that ESP "eats" about 200mA whike connecting to WiFi network, and about 60mA is used when the board is uploading data to server. I've also used these in my Raspi Smart Kegerator. So maybe that's rated for a much slower/less pressure water flow. Select Setup|Hardware to add hardware. As soon as it connected to WiFi it will connect to Domoticz server. The same also applies to hose connections: If you want to connect water hoses with different dimensions, you can print these connectors yourself. #publish.single("/Garden.Pi/WaterFlow", flow, hostname=MQTT_SERVER), Raspberry Pi per Solarzelle und Akku mit Strom versorgen, Lecture des tiquettes RFID RC522 de Raspberry Pi (NFC), How to build a ESP8266 Scale (with Weight Sensor HX711), How-To: Bluetooth Connection between ESP32s and Raspberry Pis, How to create a Solar Powered Raspberry Pi Bitcoin Miner, How to build a Smart Agriculture System using IoT. Thanks for the idea! Polling a GPIO with Python seems pretty cumbersome but if it works then Whoohoo! If this is not possible, you can use 5V and put a larger resistor between the signal output and the GPIO. Regarding the example code with the RPM class, it looks like it should work With a little help from someone at work I was able to get the RPM code running and print values however I am only reading zeros. Few words about how notifications works. Such device can be used also to determine water level. If everything is correct, you will see message " ESP successfully connected to XXXX network". We can query the Raspberry Pi Water Flow Sensor at any frequency (e.g. However, I do like your idea and glad to see younger people getting into both electronic and programming. Some time ago, my wife asked me to make a water leakage sensor. I wasn't able to find code for this that worked for me. These are: In order to be able to connect a hose, we need a so-called tap connector. https://atlas-scientific.com/embedded-solutions/ezo-embedded-flow-meter-totalizer/. The new hardware should be in the list and there should be a button "Create Virtual Sensors". Shorty you have to receive a notification on your cell phone. Your ESP now is connected to your WiFi network and ready. Also note that in the Arduino example, the sensor is connected to 5V, which the Arduino can produce - GPy can't. And what is a potentiometer? Now you can't know are there enough power to send alarm message or not. The ultrasound transmitter (trig pin) emits a high-frequency sound (40 kHz). Latter I will tell why. Looks like your connection to Forum was lost, please wait while we try to reconnect. HT7333 3.3V MS Low Dropout Linear Regulator Power Supply modu. Normally those modules comes with factory firmware. What is mqtt? Probably why you're getting zeroes, because there's nothing on the output of the sensor. EDIT: I added ingredients list to 'Stuff' section in the README. You can find instructions how to install ampy here. Than we need to connect our module to PC to erase firmware. 1. esptool installed, for erasing modules and flashing firmware, 2. This is awesome and it's something I've been thinking about building for my aquaponic system. TL;DR: Looking for help getting a water flow rate sensor working on my Gpy/Expansion Board 3.1, new to MicroPython and struggling. You can test notification by clicking "Test". Output Waveform:Square Wave,output pulse signal. I tried running the referenced Arduino code on an UNO with the sensor to ensure it was working correctly and everything works perfectly. My desired output would be in L/min. It let us switch the ESP module only when water is detected. Please note the number below "IDX". In my case it is COM5. By-the-way, before I retired, I reversed engineered many old circuits and modernize them with new circuit designs including micro-controllers and programming as well. Also normally you need API key for notification to work.

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