Extend valid slave address to 255.
Although the Modbus standard defines the range from 0 to 247, some device manufactures use 255 as default address and the only way to change it is by Modbus write, so it is not possible to use qModMaster to do that.
Anonymous
Although it is possible to set slave address to 255, if you see the Bus Monitor, it sends 0xF7 for any address above 247.
Thanks a lot writing in. I will fix it asap.
Best Regards