Uploaded October 2023 | Updated September 2026, 2 weeks ago
Let's test the pH meter, another sensor we use in the system. pH meter measures analog value and the signal input of the module is connected to the Analog 0 pin in the circuit, while the power inputs of the module are connected to the 5-volt and ground line of the circuit. Open the shared code for the pH meter, the Wi-Fi board analog pin in the circuit reads an analog voltage value from 0V to 3.3V, and the code is prepared according to this. If you are using a different board, this value should be updated with the analog voltage value provided by the board. Upload the code to the circuit, then turn on the serial monitor and observe the values. Since the pH probe has not yet been in contact with a liquid, the values are high as can be seen, now let's immerse the probe in tap water. The pH of water can vary depending on several factors, including the weather, but tap water typically has a p-H of about 7.5. We will touch on the pH value required for a hydroponic system later. As you can see, the code and the circuit work successfully. @DFROBOTCN @PCBWay
Let's test the pH meter, another sensor we use in the system. pH meter measures analog value and the signal input of the module is connected to the Analog 0 pin in the circuit, while the power inputs of the module are connected to the 5-volt and ground line of the circuit. Open the shared code for the pH meter, the Wi-Fi board analog pin in the circuit reads an analog voltage value from 0V to 3.3V, and the code is prepared according to this. If you are using a different board, this value should be updated with the analog voltage value provided by the board. Upload the code to the circuit, then turn on the serial monitor and observe the values. Since the pH probe has not yet been in contact with a liquid, the values are high as can be seen, now let's immerse the probe in tap water. The pH of water can vary depending on several factors, including the weather, but tap water typically has a p-H of about 7.5. We will touch on the pH value required for a hydroponic system later. As you can see, the code and the circuit work successfully. @DFROBOTCN @PCBWay
