Problems with wind direction and speed sensors

chenbingjy · Published on 2017-12-12 08:38

Problems with wind direction and speed sensors [Copy link]

I use STM32F107VCT6 to write a program, and use wind direction and wind speed sensors. They are all 485 interfaces, connected to the same 485. But the data is accurate when only one sensor is connected, but not when two are connected. Can an expert give me some advice, what should I do? Thank you!

maychang · Published on 2017-12-12 09:19

The data collected by connecting only one sensor is accurate, but it is inaccurate when connecting two sensors. Are your two sensors sending data at the same time?

chenbingjy · Published on 2017-12-12 09:33

maychang posted on 2017-12-12 09:19 It is accurate if you only connect one sensor, but it is inaccurate if you connect two sensors together. Are your two sensors sending data at the same time?

They should not be sending data at the same time, but I don't know why it is inaccurate.

maychang · Published on 2017-12-12 10:23

chenbingjy posted on 2017-12-12 09:33 The data should not be sent at the same time, but I don’t know why it is wrong

The data should not be sent at the same time, but I don’t know why it is wrong “The data should not be sent at the same time”, how do you know? What do you base your judgment on?

chenbingjy · Published on 2017-12-12 12:38

I have left enough time between sending the wind speed request and the wind direction request

chunyang · Published on 2017-12-12 15:39

485 requires a protocol, and the sensor must have a built-in MCU to work in a network under a unified protocol.

chenbingjy · Published on 2017-12-12 16:30

chunyang posted on 2017-12-12 15:39 485 requires a protocol, and the sensor must have a built-in MCU to work in a network under a unified protocol.

I have done it. It turns out that the addresses of my two sensors are set to the same. Thanks to all the experts

huo_hu · Published on 2017-12-12 19:35

YZW977 · Published on 2017-12-19 16:53

What type of wind sensor are you using? I want to measure wind speed but I don't know which one to choose.

chenbingjy · Published on 2017-12-19 17:05

YZW977 posted on 2017-12-19 16:53 OP, what type of wind speed sensor are you using? I am going to measure the wind speed, but I don’t know which one to choose

RS-FS-N01 RS485 Wind Speed Transmitter

YZW977 · Published on 2017-12-19 17:27

chenbingjy posted on 2017-12-19 17:05 RS-FS-N01 RS485 Wind Speed Transmitter

OK, thank you

chenbingjy · Published on 2017-12-19 17:35

YZW977 posted on 2017-12-19 17:27 Ok, thank you

You're welcome

Problems with wind direction and speed sensors [Copy link]

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