data_collection: new esp32p4_nano app with ethernet + SMP/UDP OTA

Add a minimal data_collection application targeting
esp32p4_nano/esp32p4/hpcore:

- Ethernet (RMII EMAC) with DHCPv4 addressing
- sysbuild + MCUboot (swap-using-move, dev signing)
- OTA over SMP/UDP (MCUmgr IMG + OS groups)
- UART shell on the console

Register the app in poe.toml's app task (single allowed board).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: rosterloh

applications/data_collection/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(data_collection)
+
+# We always want colored gcc output
+zephyr_compile_options(-fdiagnostics-color=always)
+
+target_sources(app PRIVATE src/main.c)

applications/data_collection/VERSION

@@ -0,0 +1,5 @@
+VERSION_MAJOR = 0
+VERSION_MINOR = 1
+PATCHLEVEL = 0
+VERSION_TWEAK = 0
+EXTRAVERSION =

applications/data_collection/prj.conf

@@ -0,0 +1,40 @@
+# Application
+CONFIG_MAIN_STACK_SIZE=2560
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2304
+CONFIG_SHELL=y
+CONFIG_REBOOT=y
+CONFIG_LOG=y
+
+# Networking: Ethernet (RMII EMAC) + DHCPv4
+CONFIG_NETWORKING=y
+CONFIG_NET_IPV4=y
+CONFIG_NET_UDP=y
+CONFIG_NET_DHCPV4=y
+CONFIG_NET_L2_ETHERNET=y
+CONFIG_ETH_ESP32=y
+CONFIG_NET_SOCKETS=y
+CONFIG_NET_MGMT=y
+CONFIG_NET_MGMT_EVENT=y
+CONFIG_NET_CONFIG_SETTINGS=y
+CONFIG_NET_CONFIG_NEED_IPV4=y
+
+# Flash and image management (MCUboot OTA receiver)
+CONFIG_BOOTLOADER_MCUBOOT=y
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_STREAM_FLASH=y
+CONFIG_IMG_MANAGER=y
+CONFIG_IMG_ERASE_PROGRESSIVELY=y
+CONFIG_MCUBOOT_IMG_MANAGER=y
+
+# MCUmgr: SMP protocol for OTA image upload and OS management
+CONFIG_NET_BUF=y
+CONFIG_ZCBOR=y
+CONFIG_CRC=y
+CONFIG_MCUMGR=y
+CONFIG_MCUMGR_GRP_IMG=y
+CONFIG_MCUMGR_GRP_OS=y
+
+# OTA over SMP/UDP (IPv4) - upload with `mcumgr --conntype udp ...`
+CONFIG_MCUMGR_TRANSPORT_UDP=y
+CONFIG_MCUMGR_TRANSPORT_UDP_IPV4=y

applications/data_collection/src/main.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2026 Richard Osterloh
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/net/net_if.h>
+#include <zephyr/net/net_mgmt.h>
+#include <zephyr/net/net_event.h>
+
+LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);
+
+static struct net_mgmt_event_callback ipv4_cb;
+
+static void on_ipv4_addr_add(struct net_mgmt_event_callback *cb, uint64_t mgmt_event,
+			     struct net_if *iface)
+{
+	if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) {
+		return;
+	}
+
+	for (int i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
+		struct net_if_addr *if_addr = &iface->config.ip.ipv4->unicast[i].ipv4;
+		char buf[NET_IPV4_ADDR_LEN];
+
+		if (!if_addr->is_used || if_addr->addr_type != NET_ADDR_DHCP) {
+			continue;
+		}
+
+		LOG_INF("IPv4 address: %s",
+			net_addr_ntop(AF_INET, &if_addr->address.in_addr, buf, sizeof(buf)));
+	}
+}
+
+int main(void)
+{
+	LOG_INF("data_collection starting (SMP/UDP OTA ready)");
+
+	net_mgmt_init_event_callback(&ipv4_cb, on_ipv4_addr_add, NET_EVENT_IPV4_ADDR_ADD);
+	net_mgmt_add_event_callback(&ipv4_cb);
+
+	return 0;
+}

applications/data_collection/sysbuild.conf

@@ -0,0 +1,2 @@
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_MCUBOOT_MODE_SWAP_USING_MOVE=y

applications/data_collection/sysbuild/mcuboot.conf

@@ -0,0 +1,14 @@
+# MCUboot configuration for the ESP32-P4-Nano (esp32p4_nano board).
+
+# Image signing: none for development.
+# Switch to CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256 before production and
+# generate a key pair with: west sign --tool imgtool --key <key.pem>
+CONFIG_BOOT_SIGNATURE_TYPE_NONE=y
+CONFIG_BOOT_VALIDATE_SLOT0=n
+
+# Silent bootloader - no serial output to avoid interfering with app console
+CONFIG_BOOT_BANNER=n
+CONFIG_UART_CONSOLE=n
+CONFIG_CONSOLE=n
+CONFIG_SERIAL=n
+CONFIG_MCUBOOT_LOG_LEVEL_OFF=y

poe.toml

@@ -278,6 +278,7 @@ case "${app}" in
     pico_fw)              ALLOWED="rpi_pico/rp2040/w"; DEFAULT="rpi_pico/rp2040/w" ;;
     pt_mcp)               ALLOWED="xiao_esp32c5/esp32c5/hpcore"; DEFAULT="xiao_esp32c5/esp32c5/hpcore" ;;
     rasprover)            ALLOWED="ros_driver/esp32/procpu native_sim/native/64"; DEFAULT="ros_driver/esp32/procpu" ;;
+    data_collection)      ALLOWED="esp32p4_nano/esp32p4/hpcore"; DEFAULT="esp32p4_nano/esp32p4/hpcore" ;;
     *) echo "unknown app: ${app}" >&2; exit 2 ;;
 esac
 
@@ -294,7 +295,7 @@ case "${sysbuild}" in true|True|1|yes) EXTRA="--sysbuild" ;; esac
 west build -b "$BOARD" -p always $EXTRA --build-dir builds/${app} applications/${app}
 """
 args = [
-    { name = "app", positional = true, help = "App name (motor_controller, joystick_controller, embedded_vision, force_sensor, pico_fw, pt_mcp, rasprover)" },
+    { name = "app", positional = true, help = "App name (motor_controller, joystick_controller, embedded_vision, force_sensor, pico_fw, pt_mcp, rasprover, data_collection)" },
     { name = "board", options = ["-b", "--board"], help = "Override target board (must be in app's allowed list)" },
     { name = "sysbuild", type = "boolean", help = "Build with sysbuild (e.g. for MCUboot integration)" },
 ]