Monitoring

In this project, we'll learn how to make our own IoT-based TDS meter using NodeMCU ESP8266 and a TDS sensor for monitoring water quality. The TDS value, which stands for "Total Dissolved Solids," tells how many solids are dissolved in water. Salts, minerals, and metal ions that conduct electricity are all examples of these solids. The value of the water is also called its conductivity. Because the water conducts electricity better when there are more of these solids or ions in it. Most TDS meters measure this conductivity in micro siemens or parts per million (ppm). This means that there are a certain number of solid particles for every million water particles. With a value of 40 ppm, there are 40 dissolved ions for every million particles. This means that the rest of the particles (=999,960) are water molecules. The TDS Sensor can measure both the EC and the TDS of a liquid (Electrical Conductivity). A device called an electrical conductivity meter (EC meter) measures how well a solution conducts electricity. It is often

used in hydroponics, aquaculture, aquaponics, pisciculture, and freshwater systems to measure the amount of nutrients, salts, or impurities in the water. To make our own IoT-based TDS meter, we'll need a TDS sensor and a waterproof temperature sensor. We need an IoT platform to send the TDS, EC, and temperature measurements. Blynk is the best free IoT platform. The ESP8266-based TDS Meter connects to wifi and continuously sends data to the Blynk app. So, you can get a report on your water quality 24 hours a day, 7 days a week. So, the TDS sensor is the best sensor for monitoring water quality. You can also add a Ph Sensor and a Turbidity Sensor to learn more about the Water Quality.

Nodemcu Board (NodeMCU ESP8266 Wifi Module) TDS Sensor DS18B20 Sensor (DS18B20 One-Wire Waterproof Temperature Sensor) Resistor 4.7K Jumper Wires Breadboard The diagram and connections for the TDS meter Below is a diagram of how to connect NodeMCU ESP8266 and TDS Sensor. The TDS Sensor's analog pin is hooked up to NodeMCU's A0. The VCC pin is connected to 3.3V and the GND pin is connected to GND.

Calibration is what the DS18B0 Temperature Sensor is used for. This is because the TDS value changes as the temperature does, so the temperature of the liquid needs to be taken into account. The DS18B20 Waterproof Temperature Sensor does this.

Without the Blynk App, the IoT Water Quality Monitoring Project would not be complete. The Internet of Things is what Blynk is made for. It can remotely control hardware, show sensor data, store data, visualize it, and do a lot of other cool things. Get the Blynk app from the Google Play Store and install it. The App Store has downloads for people who use IOS. Once the app is installed, open it and sign up using your email address and password. You can make your UI by dragging, dropping, and filling in details, as well as assigning virtual pins. Once the UI is set up, you can send an email to

ask for the authentication token. For the code, you will need the Authentication Token. IoT Based TDS Meter with ESP8266 for Monitoring Water Quality The NodeMCU tries to connect to the network after the code has been uploaded. Once it is connected to a WiFi network, it will start sending data to the Blynk Server. You can take different samples of water and check its TDS Value, EC Value, and temperature. When you add salt or any other ionic solute, the TDS value goes up quickly. On the Blynk Application Dashboard, you can keep an eye on the data.