DS18B20 is only giving -127 - Sensors - Arduino Forum
2021年7月18日 · Using Arduino Sensors. scout01 July 18, 2021, 9:27pm 1. Hello to everyone, i am trying to use an DS18B20 to get an temperature measurment. But i only get an -127 reading. Through the Forum i learned that this is probably an connection problem.
Arduino nano with MAX485 and DS18B20
2024年1月23日 · You may get familiar with the following facts of DS18B20 Digital Temp Sensor and then create your sketch: 1. More than one sensors can be connected with an input pin of the Arduino UNO; hence, it is a "One Wire Device". 2. The following lines are included in the sketch to tell that the sensor is connected with DPin-7.
DS18B20, total of 3 sensors but only 2 are working - Arduino Forum
2024年1月21日 · Using Arduino Programming Questions. I have wired up 3 x DS18B20 sensors and are using this code (see below) to read the data. However, the output gives me correct temperatures for sensors 1 & ,3 but 2 always reads -127°C. I have swapped the sensors around, connector wires, inputs, etc. all to no avail so it is clearly a problem with the code.
ds18b20 issue show -127°c - Sensors - Arduino Forum
2018年7月7日 · hello, i have problem with using this sensore, sometimes when power on arduino the display show me -27°c( -127°C but i am using 7 digit numbers with only 2 numbers) if i reconect only the sensor power it work but after some times it show back, i am using 2 sensors trying change pull up from 4k7 to 2k2 and also capacitor 100uf between gnd and 5v, but i am …
DS18B20 temperature sensor circuit: accuracy? - Arduino Forum
2023年6月30日 · Learn how to read the temperature from one or multiple DS18B20 sensors with an Arduino. My circuit is the 'normal' option, reproduced below. But I'm wondering about the accuracy of the result. My commercial unit that I believe accurate says 19.4 versus 24.1 from the Arduino citcuit. Both probes are suspended and are a mere inch apart.
Problem with DS18b20 error code = -127 - Arduino Forum
2020年5月23日 · I'm interfacing 2 ds18b20 sensors with arduino mega 2560. I'm reading from both sensors after 4 seconds and displaying their values on lcd. After some time my sensors started giving -127 temperature in celsius. In the da…
DS18B20 one-wire implementation Arduino OPTA
2023年3月24日 · The DS18B20 will not work with the Opta. The Opta only has analog inputs, not digital inputs. One-wire is a serial protocol that needs one digital input. To read a temperature sensor with the Opta, use an analog temperature sensor such as the LM35, the TMP36, or a thermocouple with an analog output amplifier. 1 Like.
DS18B20 multiple sensors - Arduino Forum
2013年2月25日 · Using Arduino Sensors. gasperinn February 25, 2013, 3:37pm 1. Hi, I have connected 9 of DS18B20 sensors on the arduino mega (pin 3) and one DHT22 sensor on pin 2. With 5minutes delay, the arduino board on serial monitor prints all addresses of those DS18B20 with their temperatures and temperature and humidity of that DHT22 sensor.
DS18b20 - multiple sensors, different readout increments
2024年4月2日 · Hi, I'm using 3 DS18B20 sensors coupled to the same pin (2) and using the OneWire library to read out the temperatures. It is used to measure the rising in temperature along 3 parts of a process (so they don't read out the same temperature at the same time). The first sensor reads out with 0,01 degree increments, while the two other ones jump ...
Ds18b20 returning wrong CRC - Sensors - Arduino Forum
2021年10月28日 · Using Arduino Sensors. iamagainst October 28, 2021, 10:16pm 1. Hi there, I'm trying to use a ds18b20 sensor and temperature reading was working fine so I decided to go all the way and add CRC checking to make the program more robust. When reading the whole memory I see that the sensor's CRC is always a different value even for the same set of ...