Hi, After going through:
https://tls.mbed.org/kb/how-to/reduce-mbedtls-memory-and-storage-footprint Did some tuning to the mbedtls lib by changing the following parameters: #define MBEDTLS_MPI_WINDOW_SIZE 6 #define MBEDTLS_MPI_MAX_SIZE 1024 #define MBEDTLS_ECP_WINDOW_SIZE 2 #define MBEDTLS_SSL_MAX_CONTENT_LEN 2048 #define MBEDTLS_SSL_IN_CONTENT_LEN 2048 #define MBEDTLS_SSL_OUT_CONTENT_LEN 2048 With that change and with the default lwipopts: #define MEM_SIZE (10*1024) #define MEMP_NUM_PBUF 10 #define MEMP_NUM_TCP_PCB 10 #define MEMP_NUM_TCP_PCB_LISTEN 5 #define MEMP_NUM_TCP_SEG 8 #define TCP_SND_BUF (4*TCP_MSS) #define TCP_SND_QUEUELEN (2* TCP_SND_BUF/TCP_MSS) #define TCP_WND (2*TCP_MSS) altcp_mbedtls gets connected to a locally confgured mosquitto .. (152) mqtt_example_init: Connecting to MQTT Broker:192.168.1.34:8883 tcp_bind: bind to port 57804 mqtt_client_connect: Connecting to host: 192.168.1.34 at port:8883 tcp_connect to port 8883 tcp_recved: received 1460 bytes, wnd 2920 (0). tcp_recved: received 945 bytes, wnd 2920 (0). I do not see anything else (or the handshake for that) from altcp_mbedtls At the mosquitto end of it, however I do get: 1598200852: New connection from 192.168.1.33 on port 8883. 1598200853: OpenSSL Error: error:1417C0C7:SSL routines:tls_process_client_certif icate:peer did not return a certificate 1598200853: Socket error on client <unknown>, disconnecting. Any thoughts or suggestions, on what's going on ? Thanks, Manu _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
