======Modbus Library Reference======
Available in Wattmon OS 3.12+
The Modbus include library contains functions and defines as shown below.
**Usage:**
include("/lib/uphp/modbus.inc");
**Source:**
[[modbus.inc|View Source]]
===== Defines =====
^DEFINE^VALUE^
|MB_ILLEGAL_FUNCTION|-1|
|MB_ILLEGAL_ADDRESS|-2|
|MB_ILLEGAL_VALUE|-3|
|MB_SLAVE_FAILURE|-4|
===== Functions =====
Click on the function name for further details:
^FUNCTION NAME^PARAMETER(S)^RETURN^LIBRARY^DESCRIPTION^
|[[mb_get_error_string]]|int error|string|[[modbus]]|Get human readable error description|
|[[mb_set_float_be_0x10]]|int id, int bus, int reg, int val, int retries|int|[[modbus]]|Set a modbus float in big endian using function 10h|
|[[mb_set_float_le_0x10]]|int id, int bus, int reg, int val, int retries|int|[[modbus]]|Set a modbus float in little endian using function 10h|
|[[mb_set_int16_0x03]]|int id, int bus, int reg, int val, int retries|int|[[modbus]]|Set a modbus device register using function 03h|
|[[mb_set_int16_0x10]]|int id, int bus, int reg, int val, int retries|int|[[modbus]]|Set a modbus device register using function 10h|
|[[mb_set_uint32_be_0x10]]|int id, int bus, int reg, int val, int retries|int|[[modbus]]|Set a modbus UINT32 in big endian using function 10h|
|[[mb_set_uint32_le_0x10]]|int id, int bus, int reg, int val, int retries|int|[[modbus]]|Set a modbus UINT32 in little endian using function 10h|
===== Example =====