Fix example of modbus_rtu_set_serial_mode (closes #552)

stephane · Oct 22, 2024 · 51f37e0 · 51f37e0
1 parent 452dc8b
commit 51f37e0
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/docs/modbus_rtu_set_rts.md b/docs/modbus_rtu_set_rts.md
@@ -45,15 +45,16 @@ uint16_t tab_reg[10];
 
 ctx = modbus_new_rtu("/dev/ttyS0", 115200, 'N', 8, 1);
 modbus_set_slave(ctx, 1);
-modbus_rtu_set_serial_mode(ctx, MODBUS_RTU_RS485);
-modbus_rtu_set_rts(ctx, MODBUS_RTU_RTS_UP);
 
 if (modbus_connect(ctx) == -1) {
     fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
     modbus_free(ctx);
     return -1;
 }
 
+modbus_rtu_set_serial_mode(ctx, MODBUS_RTU_RS485);
+modbus_rtu_set_rts(ctx, MODBUS_RTU_RTS_UP);
+
 rc = modbus_read_registers(ctx, 0, 7, tab_reg);
 if (rc == -1) {
     fprintf(stderr, "%s\n", modbus_strerror(errno));