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Difference in wifi_uart_service in newer MCU SDK versions

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jimbofever
Posts: 1

Hello, in these days I'm debugging an issue where at some point the wifi_data_process_buf buffer becomes full and the MCU stop responding to the module's heartbeat.

In particular, with MCU SDK version v2.6.2, inside wifi_uart_service i find this code:

Code: Select all

if (rx_value_len > sizeof(wifi_data_process_buf) + PROTOCOL_HEAD) {
            TUYA_DBG_EXEC(TUYA_PRINT("length overflow, got %d.", rx_value_len));
            TUYA_DBG_EXEC(TUYA_PRINT("whole process buffer and rx buffer discarded."));
            rx_buf_in = rx_buf_out = wifi_uart_rx_buf;
            break;
        }

that breaks when there is length overflow without calling data_handle. I'm currently investigating why it keep filling up the buffer, but I noticed that in another project, where I used MCU SDK version v2.5.6, the same condition was handled differently:

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if(rx_value_len > sizeof(wifi_data_process_buf) + PROTOCOL_HEAD) {
            offset += 3;
            continue;
        }

There's a continune instead of a break so data_handle was called even if the buffer was full.

Can I get some info on why that code was changed in the latest MCU SDK versions?

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