diff --git a/mongoose.c b/mongoose.c
index 000cbc58..732f8a50 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -5107,7 +5107,7 @@ static size_t ether_output(struct mg_tcpip_if *ifp, size_t len) {
   return n;
 }
 
-static void arp_ask(struct mg_tcpip_if *ifp, uint32_t ip) {
+void mg_tcpip_arp_request(struct mg_tcpip_if *ifp, uint32_t ip, uint8_t *mac) {
   struct eth *eth = (struct eth *) ifp->tx.buf;
   struct arp *arp = (struct arp *) (eth + 1);
   memset(eth->dst, 255, sizeof(eth->dst));
@@ -5118,6 +5118,7 @@ static void arp_ask(struct mg_tcpip_if *ifp, uint32_t ip) {
   arp->plen = 4;
   arp->op = mg_htons(1), arp->tpa = ip, arp->spa = ifp->ip;
   memcpy(arp->sha, ifp->mac, sizeof(arp->sha));
+  if (mac != NULL) memcpy(arp->tha, mac, sizeof(arp->tha));
   ether_output(ifp, PDIFF(eth, arp + 1));
 }
 
@@ -5126,7 +5127,7 @@ static void onstatechange(struct mg_tcpip_if *ifp) {
     MG_INFO(("READY, IP: %M", mg_print_ip4, &ifp->ip));
     MG_INFO(("       GW: %M", mg_print_ip4, &ifp->gw));
     MG_INFO(("      MAC: %M", mg_print_mac, &ifp->mac));
-    arp_ask(ifp, ifp->gw);  // unsolicited GW ARP request
+    mg_tcpip_arp_request(ifp, ifp->gw, NULL);  // unsolicited GW ARP request
   } else if (ifp->state == MG_TCPIP_STATE_UP) {
     MG_ERROR(("Link up"));
     srand((unsigned int) mg_millis());
@@ -5785,6 +5786,7 @@ static void mg_tcpip_rx(struct mg_tcpip_if *ifp, void *buf, size_t len) {
   if (pkt.eth->type == mg_htons(0x806)) {
     pkt.arp = (struct arp *) (pkt.eth + 1);
     if (sizeof(*pkt.eth) + sizeof(*pkt.arp) > pkt.raw.len) return;  // Truncated
+    mg_tcpip_call(ifp, MG_TCPIP_EV_ARP, &pkt.raw);
     rx_arp(ifp, &pkt);
   } else if (pkt.eth->type == mg_htons(0x86dd)) {
     pkt.ip6 = (struct ip6 *) (pkt.eth + 1);
@@ -5834,6 +5836,7 @@ static void mg_tcpip_poll(struct mg_tcpip_if *ifp, uint64_t now) {
       onstatechange(ifp);
     }
     if (ifp->state == MG_TCPIP_STATE_DOWN) MG_ERROR(("Network is down"));
+    mg_tcpip_call(ifp, MG_TCPIP_EV_TIMER_1S, NULL);
   }
   if (ifp->state == MG_TCPIP_STATE_DOWN) return;
 
@@ -5996,7 +5999,7 @@ void mg_connect_resolved(struct mg_connection *c) {
              rem_ip != ifp->gw) {  // skip if gw (onstatechange -> READY -> ARP)
     // If we're in the same LAN, fire an ARP lookup.
     MG_DEBUG(("%lu ARP lookup...", c->id));
-    arp_ask(ifp, rem_ip);
+    mg_tcpip_arp_request(ifp, rem_ip, NULL);
     settmout(c, MIP_TTYPE_ARP);
     c->is_arplooking = 1;
   } else if ((*((uint8_t *) &rem_ip) & 0xE0) == 0xE0) {
diff --git a/mongoose.h b/mongoose.h
index de0982e4..b9826139 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -2739,6 +2739,8 @@ enum {
   MG_TCPIP_EV_ST_CHG,     // state change             uint8_t * (&ifp->state)
   MG_TCPIP_EV_DHCP_DNS,   // DHCP DNS assignment      uint32_t *ipaddr
   MG_TCPIP_EV_DHCP_SNTP,  // DHCP SNTP assignment     uint32_t *ipaddr
+  MG_TCPIP_EV_ARP,        // Got ARP packet           struct mg_str *
+  MG_TCPIP_EV_TIMER_1S,   // 1 second timer           NULL
   MG_TCPIP_EV_USER        // Starting ID for user events
 };
 
@@ -2782,6 +2784,7 @@ struct mg_tcpip_if {
 void mg_tcpip_init(struct mg_mgr *, struct mg_tcpip_if *);
 void mg_tcpip_free(struct mg_tcpip_if *);
 void mg_tcpip_qwrite(void *buf, size_t len, struct mg_tcpip_if *ifp);
+void mg_tcpip_arp_request(struct mg_tcpip_if *ifp, uint32_t ip, uint8_t *mac);
 
 extern struct mg_tcpip_driver mg_tcpip_driver_stm32f;
 extern struct mg_tcpip_driver mg_tcpip_driver_w5500;
diff --git a/src/net_builtin.c b/src/net_builtin.c
index 76c091ec..64e891f4 100644
--- a/src/net_builtin.c
+++ b/src/net_builtin.c
@@ -185,7 +185,7 @@ static size_t ether_output(struct mg_tcpip_if *ifp, size_t len) {
   return n;
 }
 
-static void arp_ask(struct mg_tcpip_if *ifp, uint32_t ip) {
+void mg_tcpip_arp_request(struct mg_tcpip_if *ifp, uint32_t ip, uint8_t *mac) {
   struct eth *eth = (struct eth *) ifp->tx.buf;
   struct arp *arp = (struct arp *) (eth + 1);
   memset(eth->dst, 255, sizeof(eth->dst));
@@ -196,6 +196,7 @@ static void arp_ask(struct mg_tcpip_if *ifp, uint32_t ip) {
   arp->plen = 4;
   arp->op = mg_htons(1), arp->tpa = ip, arp->spa = ifp->ip;
   memcpy(arp->sha, ifp->mac, sizeof(arp->sha));
+  if (mac != NULL) memcpy(arp->tha, mac, sizeof(arp->tha));
   ether_output(ifp, PDIFF(eth, arp + 1));
 }
 
@@ -204,7 +205,7 @@ static void onstatechange(struct mg_tcpip_if *ifp) {
     MG_INFO(("READY, IP: %M", mg_print_ip4, &ifp->ip));
     MG_INFO(("       GW: %M", mg_print_ip4, &ifp->gw));
     MG_INFO(("      MAC: %M", mg_print_mac, &ifp->mac));
-    arp_ask(ifp, ifp->gw);  // unsolicited GW ARP request
+    mg_tcpip_arp_request(ifp, ifp->gw, NULL);  // unsolicited GW ARP request
   } else if (ifp->state == MG_TCPIP_STATE_UP) {
     MG_ERROR(("Link up"));
     srand((unsigned int) mg_millis());
@@ -863,6 +864,7 @@ static void mg_tcpip_rx(struct mg_tcpip_if *ifp, void *buf, size_t len) {
   if (pkt.eth->type == mg_htons(0x806)) {
     pkt.arp = (struct arp *) (pkt.eth + 1);
     if (sizeof(*pkt.eth) + sizeof(*pkt.arp) > pkt.raw.len) return;  // Truncated
+    mg_tcpip_call(ifp, MG_TCPIP_EV_ARP, &pkt.raw);
     rx_arp(ifp, &pkt);
   } else if (pkt.eth->type == mg_htons(0x86dd)) {
     pkt.ip6 = (struct ip6 *) (pkt.eth + 1);
@@ -912,6 +914,7 @@ static void mg_tcpip_poll(struct mg_tcpip_if *ifp, uint64_t now) {
       onstatechange(ifp);
     }
     if (ifp->state == MG_TCPIP_STATE_DOWN) MG_ERROR(("Network is down"));
+    mg_tcpip_call(ifp, MG_TCPIP_EV_TIMER_1S, NULL);
   }
   if (ifp->state == MG_TCPIP_STATE_DOWN) return;
 
@@ -1074,7 +1077,7 @@ void mg_connect_resolved(struct mg_connection *c) {
              rem_ip != ifp->gw) {  // skip if gw (onstatechange -> READY -> ARP)
     // If we're in the same LAN, fire an ARP lookup.
     MG_DEBUG(("%lu ARP lookup...", c->id));
-    arp_ask(ifp, rem_ip);
+    mg_tcpip_arp_request(ifp, rem_ip, NULL);
     settmout(c, MIP_TTYPE_ARP);
     c->is_arplooking = 1;
   } else if ((*((uint8_t *) &rem_ip) & 0xE0) == 0xE0) {
diff --git a/src/net_builtin.h b/src/net_builtin.h
index e6e625d7..c672d989 100644
--- a/src/net_builtin.h
+++ b/src/net_builtin.h
@@ -22,6 +22,8 @@ enum {
   MG_TCPIP_EV_ST_CHG,     // state change             uint8_t * (&ifp->state)
   MG_TCPIP_EV_DHCP_DNS,   // DHCP DNS assignment      uint32_t *ipaddr
   MG_TCPIP_EV_DHCP_SNTP,  // DHCP SNTP assignment     uint32_t *ipaddr
+  MG_TCPIP_EV_ARP,        // Got ARP packet           struct mg_str *
+  MG_TCPIP_EV_TIMER_1S,   // 1 second timer           NULL
   MG_TCPIP_EV_USER        // Starting ID for user events
 };
 
@@ -65,6 +67,7 @@ struct mg_tcpip_if {
 void mg_tcpip_init(struct mg_mgr *, struct mg_tcpip_if *);
 void mg_tcpip_free(struct mg_tcpip_if *);
 void mg_tcpip_qwrite(void *buf, size_t len, struct mg_tcpip_if *ifp);
+void mg_tcpip_arp_request(struct mg_tcpip_if *ifp, uint32_t ip, uint8_t *mac);
 
 extern struct mg_tcpip_driver mg_tcpip_driver_stm32f;
 extern struct mg_tcpip_driver mg_tcpip_driver_w5500;
diff --git a/tutorials/tcpip/pcap-driver/main.c b/tutorials/tcpip/pcap-driver/main.c
index dea210b3..7e93e79f 100644
--- a/tutorials/tcpip/pcap-driver/main.c
+++ b/tutorials/tcpip/pcap-driver/main.c
@@ -6,9 +6,9 @@
 #include <pcap.h>
 #include "mongoose.h"
 
-#define MQTT_URL "mqtt://broker.emqx.io:1883"    // MQTT broker URL
-#define MQTTS_URL "mqtts://mongoose.ws:8883"  // HiveMQ does not TLS1.3
-#define MQTT_TOPIC "mg/rx"                       // Topic to subscribe to
+#define MQTT_URL "mqtt://broker.emqx.io:1883"  // MQTT broker URL
+#define MQTTS_URL "mqtts://mongoose.ws:8883"   // HiveMQ does not TLS1.3
+#define MQTT_TOPIC "mg/rx"                     // Topic to subscribe to
 
 // // Taken from broker.emqx.io
 static const char *s_ca_cert =
@@ -192,6 +192,35 @@ static void mqtt_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
   }
 }
 
+static void if_ev_handler(struct mg_tcpip_if *ifp, int ev, void *ev_data) {
+  static uint32_t ip = 0;
+  static unsigned counter = 0;
+
+  // Set initial self-assigned IP
+  if (ip == 0) ip = MG_IPV4(169, 254, 2, 100);  
+
+  // Catch ARP packets. Parse them yourself, that's easy.
+  if (ev == MG_TCPIP_EV_ARP) {
+    struct mg_str *frame = ev_data;
+    MG_INFO(("Iface %p: Got ARP frame", ifp));
+    mg_hexdump(frame->buf, frame->len);
+    // TODO: check for conflict. On conflict, increment ip and reset counter
+  }
+
+  // Catch 1 second timer events
+  if (ev == MG_TCPIP_EV_TIMER_1S && ifp->ip == 0) {
+    MG_INFO(("Sending ARP probe"));
+    mg_tcpip_arp_request(ifp, ip, NULL);
+
+    // Seems to be no conflict. Assign us an IP
+    if (counter++ > 2) {
+      MG_INFO(("Assigning %M, sending ARP probe", mg_print_ip4, &ip));
+      ifp->ip = ip;
+      mg_tcpip_arp_request(ifp, ip, ifp->mac);
+    }
+  }
+}
+
 int main(int argc, char *argv[]) {
   const char *iface = "lo0";              // Network iface
   const char *mac = "02:00:01:02:03:77";  // MAC address
@@ -252,6 +281,10 @@ int main(int argc, char *argv[]) {
          &mif.mac[2], &mif.mac[3], &mif.mac[4], &mif.mac[5]);
   mg_tcpip_init(&mgr, &mif);
 
+  // Call order is important: call after mg_tcpip_init()
+  mif.fn = if_ev_handler;
+  mif.enable_dhcp_client = false;
+
   MG_INFO(("Init done, starting main loop"));
   mg_http_listen(&mgr, "http://0.0.0.0:8000", http_ev_handler, NULL);
   mg_http_listen(&mgr, "https://0.0.0.0:8443", http_ev_handler, "tls enabled");