From 1bb131c3f8b1e64e5bad5ce4db97399f805db633 Mon Sep 17 00:00:00 2001
From: fengzero <fengzero@fengzero.com>
Date: Fri, 23 Sep 2022 03:06:00 +0000
Subject: [PATCH] fix(modbus): bit operation

---
 plugins/modbus/modbus_req.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/modbus/modbus_req.c b/plugins/modbus/modbus_req.c
index b33842f1..9f1e7852 100644
--- a/plugins/modbus/modbus_req.c
+++ b/plugins/modbus/modbus_req.c
@@ -175,7 +175,7 @@ int modbus_value_handle(void *ctx, uint8_t slave_id, uint16_t n_byte,
                     neu_value16_u v16 = { 0 };
                     v16.value         = htons(*(uint16_t *) dvalue.value.bytes);
                     dvalue.value.u8 =
-                        neu_value16_get_bit(v16, 15 - (*p_tag)->option.bit.bit);
+                        neu_value16_get_bit(v16, (*p_tag)->option.bit.bit);
                     break;
                 }
                 case MODBUS_AREA_COIL: