Hello. I'm reading MODBUS holding registers. On register 0 the value is -35 (signed). If I show this value in gage the value is 65501 (unsigned). How can I show SIGNED INTEGER? Thanks. BR.

To use the data as in the debug then you can do, for each item in the array msg.payload[i] = (msg.payload[i] << 16) >> 16

farcry 23 April 2020 13:10 4

How to calculate negative modbus value?

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MODBUS 16bit SIGNED INTEGER

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