RS485 Wind Direction
monica.cardenes 2023-03-16 06:42:49 885 Views2 Replies When I do gcc -Wall -lwiringPi -o Wind_Speed *.c; the result is that. Can somebody help me?
Hi, I encountered a few similar issues.. here's what I did to resolve -
1) Check whether you've downloaded the correct WiringPi - 32-bit or 64-bit
WiringPi is required to be downloaded & run on Raspberry Pi. It has 32-bit (ARMHF) & 64-bit (ARM64) versions. The default instructions per DFRobot website to download the latest wiringpi library will auto-download the 32-bit version (WiringPi-ARMHF) which will not work on 64-bit Raspberry Pi. If using 64-bit R PI, download Wiring Pi ARM64, filename "wiringpi-2.61-1-arm64.deb" from - https://github.com/WiringPi/WiringPi/releases/tag/2.61-1 Rename the downloaded filename from "wiringpi-2.61-1-arm64.deb" to "wiringpi-arm64.deb". This is to avoid Linux accidentally failing to install because it encounters a dot after "2" in the "2.61" of the filename. To install it, open a Command Line Interface Terminal, direct it to the folder where it has been downloaded to with cd and use the dpkg command:>> dpkg -i wiringpi-arm64.deb2) Change variable declaration from ‘int’ to ‘static int’
Open the header file "RS485_Wind_Speed_Transmitter.h" & change line 14 "int fd" to "static int fd". Save the file.
3) C compilation order
Instead of DFRobot website compilation instructions which is below - >> gcc -Wall -lwiringPi -o Wind_Speed *.c>> sudo ./Wind_SpeedChange the order of the compilation ("-lwiringPi" at the last instead of in the middle) as written below then compile as below - >> sudo gcc -Wall -o Wind_Speed *.c -lwiringPi
Then type the below to see the windspeed reading in the Command Line Interface-
>> sudo ./Wind_Speed
Hope it helps.
Liam.Eric Have you change the min.c file befor doing gcc?
For more information about RS485 Wind Direction Transmitter(SKU:SEN0482), please see the link below.
https://wiki.dfrobot.com/RS485_Wind_Direction_Transmitter_SKU_SEN0482#target_5
NeloKin 
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