ESP32 Forum

Posted: **Tue Nov 15, 2022 7:26 am**

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I (1188) GATTC_MULTIPLE_DEMO: ESP_GATTC_OPEN_EVT conn_id 0, if 3, status 0, mtu 23
I (1188) GATTC_MULTIPLE_DEMO: REMOTE BDA:
I (1198) GATTC_MULTIPLE_DEMO: ce 13 21 00 e8 02
I (1198) GATTC_MULTIPLE_DEMO: update connection params status = 0, min_int = 18, max_int = 18,conn_int = 18,latency = 4, timeout = 300
I (1218) GATTC_MULTIPLE_DEMO: REG_EVT
I (1888) GATTC_MULTIPLE_DEMO: Status 0, MTU 23, conn_id 0
I (1888) GATTC_MULTIPLE_DEMO: SEARCH RES: conn_id = 0 is primary service 1
I (1888) GATTC_MULTIPLE_DEMO: start handle 48 end handle 65535 current handle value 48
I (1898) GATTC_MULTIPLE_DEMO: UUID16: ff00
I (2018) GATTC_MULTIPLE_DEMO: write descr success
E (2088) GATTC_MULTIPLE_DEMO: write char failed, error status = 85

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查了一下错误状态码是gatt_error类型但是不知道出现此错误的原因希望大佬们指点一下

Posted: **Tue Nov 15, 2022 9:33 am**

可能是 handle 值选择不对，一般这个 gatt client 示例都是过滤特定的 service 和 characteristic UUID 的，与 gatt_server 或 gatt_server_service_table 示例配合使用的
这里你可以用手机 BLE app 分别去连运行 gatt_server_service_table 的 esp 设备和你要连接的其他蓝牙设备，比较下 characteristic 和 service 的差别
然后再看看进一步修改 gatt client 示例
有条件抓包的就抓包看下，更直观些

ESP32 Forum

ESP32使用GATTC连接蓝牙设备写入特征值显示错误 write char failed, error status = 85

ESP32使用GATTC连接蓝牙设备写入特征值显示错误 write char failed, error status = 85

Re: ESP32使用GATTC连接蓝牙设备写入特征值显示错误 write char failed, error status = 85