diff --git a/cyassl/ctaocrypt/settings.h b/cyassl/ctaocrypt/settings.h
index 36141a6bc..89c7abd33 100644
--- a/cyassl/ctaocrypt/settings.h
+++ b/cyassl/ctaocrypt/settings.h
@@ -93,6 +93,12 @@
 /* Uncomment next line if using TI-RTOS settings */
 /* #define CYASSL_TIRTOS */
 
+/* Uncomment next line if building with PicoTCP */
+/* #define CYASSL_PICOTCP */
+
+/* Uncomment next line if building for PicoTCP demo bundle */
+/* #define CYASSL_PICOTCP_DEMO */
+
 #include <cyassl/ctaocrypt/visibility.h>
 
 #ifdef IPHONE
@@ -228,6 +234,24 @@
     #define NO_MAIN_DRIVER
 #endif
 
+#ifdef CYASSL_PICOTCP
+    #define errno pico_err
+    #include "pico_defines.h"
+    #include "pico_stack.h"
+    #include "pico_constants.h"
+    #include "pico_bsd_sockets.h"
+    #define CUSTOM_RAND_GENERATE pico_rand
+#endif
+
+#ifdef CYASSL_PICOTCP_DEMO
+    #define CYASSL_STM32
+    #define FREERTOS
+    #define USE_FAST_MATH
+    #define TFM_TIMING_RESISTANT
+    #define XMALLOC(s, h, type)  pvPortMalloc((s))
+    #define XFREE(p, h, type)    vPortFree((p))
+#endif
+
 #ifdef FREERTOS_WINSIM
     #define FREERTOS
     #define USE_WINDOWS_API
diff --git a/src/io.c b/src/io.c
index 10e18fb17..d0645875c 100644
--- a/src/io.c
+++ b/src/io.c
@@ -80,7 +80,8 @@
             #include <unistd.h>
         #endif
         #include <fcntl.h>
-        #if !(defined(DEVKITPRO) || defined(HAVE_RTP_SYS) || defined(EBSNET))
+        #if !(defined(DEVKITPRO) || defined(HAVE_RTP_SYS) || defined(EBSNET)) \
+            || defined(CYASSL_PICOTCP)
             #include <sys/socket.h>
             #include <arpa/inet.h>
             #include <netinet/in.h>
@@ -153,6 +154,14 @@
         #define SOCKET_ECONNREFUSED SCK_ERROR
         #define SOCKET_ECONNABORTED SCK_ERROR
     #endif
+#elif defined(CYASSL_PICOTCP)
+    #define SOCKET_EWOULDBLOCK  PICO_ERR_EAGAIN
+    #define SOCKET_EAGAIN       PICO_ERR_EAGAIN
+    #define SOCKET_ECONNRESET   PICO_ERR_ECONNRESET
+    #define SOCKET_EINTR        PICO_ERR_EINTR
+    #define SOCKET_EPIPE        PICO_ERR_EIO
+    #define SOCKET_ECONNREFUSED PICO_ERR_ECONNREFUSED
+    #define SOCKET_ECONNABORTED PICO_ERR_ESHUTDOWN
 #else
     #define SOCKET_EWOULDBLOCK EWOULDBLOCK
     #define SOCKET_EAGAIN      EAGAIN
@@ -173,6 +182,9 @@
 #elif defined(CYASSL_LWIP)
     #define SEND_FUNCTION lwip_send
     #define RECV_FUNCTION lwip_recv
+#elif defined(CYASSL_PICOTCP)
+    #define SEND_FUNCTION pico_send
+    #define RECV_FUNCTION pico_recv
 #else
     #define SEND_FUNCTION send
     #define RECV_FUNCTION recv