diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 143f284..f431b07 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ jobs:
           arduino-cli update --additional-urls "$(<~/arduino-cores.txt)"
           echo d=$(sha256sum ~/.arduino15/package_*index.json | sha256sum | cut -d' ' -f1) >> $GITHUB_OUTPUT
       - name: Cache Arduino cores
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.arduino15/staging/packages
           key: cores-${{ steps.cores.outputs.d }}
@@ -37,22 +37,18 @@ jobs:
           mkdir -p $HOME/Arduino/libraries
           cd $HOME/Arduino/libraries
           ln -s $GITHUB_WORKSPACE esp32cam
-          mkdir -p AsyncTCP ESPAsyncWebServer ODROID-GO
+          mkdir -p AsyncTCP ESPAsyncWebServer
           curl -fsLS https://github.com/me-no-dev/AsyncTCP/archive/${ASYNCTCP_VERSION}.tar.gz \
             | tar -C AsyncTCP -xz --strip-components=1
           curl -fsLS https://github.com/me-no-dev/ESPAsyncWebServer/archive/${ESPASYNCWEBSERVER_VERSION}.tar.gz \
             | tar -C ESPAsyncWebServer -xz --strip-components=1
-          curl -fsLS https://github.com/hardkernel/ODROID-GO/archive/${ODROIDGO_VERSION}.tar.gz \
-            | tar -C ODROID-GO -xz --strip-components=1 --wildcards '*/library.properties' '*/src/odroid_go.*' '*/src/Fonts' '*/src/utility'
         env:
           ASYNCTCP_VERSION: ca8ac5f919d02bea07b474531981ddbfd64de97c
           ESPASYNCWEBSERVER_VERSION: 1d46269cedf477661ca8a29518414f4b74e957d4
-          ODROIDGO_VERSION: 4a496e337d16bca4ddedbeca3486d7b60662d017
       - name: Compile examples
         run: |
           arduino-cli compile -b esp32:esp32:esp32cam ./examples/WifiCam
           arduino-cli compile -b esp32:esp32:esp32cam ./examples/AsyncCam
-          arduino-cli compile -b esp32:esp32:odroid_esp32 ./examples/GoDisplay
       - name: Build docs
         run: docs/build.sh
       - name: Deploy docs
diff --git a/examples/GoDisplay/GoDisplay.ino b/examples/GoDisplay/GoDisplay.ino
deleted file mode 100644
index 63674bd..0000000
--- a/examples/GoDisplay/GoDisplay.ino
+++ /dev/null
@@ -1,49 +0,0 @@
-#include "SpiRamOStream.hpp"
-
-#include <HTTPClient.h>
-#include <WiFi.h>
-#include <odroid_go.h>
-
-static const char* WIFI_SSID = "my-ssid";
-static const char* WIFI_PASS = "my-pass";
-static const char* CAM_SERVER = "192.0.2.1";
-static const uint16_t CAM_PORT = 80;
-static const char* CAM_URI = "/320x240.jpg";
-
-void
-setup() {
-  GO.begin(115200);
-
-  WiFi.persistent(false);
-  WiFi.mode(WIFI_STA);
-  WiFi.begin(WIFI_SSID, WIFI_PASS);
-  if (WiFi.waitForConnectResult() != WL_CONNECTED) {
-    Serial.println("WiFi failure");
-    delay(5000);
-    ESP.restart();
-  }
-}
-
-void
-loop() {
-  WiFiClient tcp;
-  HTTPClient http;
-  http.begin(tcp, CAM_SERVER, CAM_PORT, CAM_URI);
-  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
-  int httpCode = http.GET();
-  if (httpCode != 200) {
-    Serial.printf("HTTP error %d\n", httpCode);
-    return;
-  }
-
-  int length = http.getSize();
-  if (length <= 0) {
-    Serial.printf("%lu JPEG length unknown\n", millis());
-    return;
-  }
-  Serial.printf("%lu JPEG len=%d\n", millis(), length);
-
-  SpiRamOStream os(length);
-  http.writeToStream(&os);
-  GO.lcd.drawJpg(os.data(), os.size(), 0, 0, 0, 0, 0, 0, JPEG_DIV_NONE);
-}
diff --git a/examples/GoDisplay/README.md b/examples/GoDisplay/README.md
deleted file mode 100644
index 6bec9a3..0000000
--- a/examples/GoDisplay/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# GoDisplay: camera image display for ODROID-GO
-
-This example runs on [ODROID-GO](https://wiki.odroid.com/odroid_go/odroid_go) game console.
-It displays images captured by ESP32-CAM (running WifiCam example) and retrieved over HTTP.
-To use this example, modify WiFi SSID+password and ESP32-CAM IP address, then upload to ODROID-GO.
-
-As of 2022-02-06, [ODROID-GO package](https://github.com/hardkernel/ODROID-GO) is incompatible with ESP32 Arduino core v2.0.x.
-Deleting `ODROID-GO/src/sensors` and `ODROID-GO/src/web` directories would resolve the compile errors.
diff --git a/examples/GoDisplay/SpiRamOStream.hpp b/examples/GoDisplay/SpiRamOStream.hpp
deleted file mode 100644
index ad3a8c3..0000000
--- a/examples/GoDisplay/SpiRamOStream.hpp
+++ /dev/null
@@ -1,57 +0,0 @@
-#ifndef SPIRAM_OSTREAM_HPP
-#define SPIRAM_OSTREAM_HPP
-
-#include <Arduino.h>
-
-/** @brief write-only Stream backed by fixed-size SPIRAM buffer. */
-class SpiRamOStream : public Stream {
-public:
-  explicit SpiRamOStream(size_t cap)
-    : m_buf(reinterpret_cast<uint8_t*>(heap_caps_malloc(cap, MALLOC_CAP_SPIRAM)))
-    , m_len(0)
-    , m_cap(cap) {}
-
-  ~SpiRamOStream() {
-    free(m_buf);
-  }
-
-  const uint8_t* data() const {
-    return m_buf;
-  }
-
-  const size_t size() const {
-    return m_len;
-  }
-
-  size_t write(const uint8_t* buffer, size_t size) override {
-    size_t count = min(size, m_cap - m_len);
-    memcpy(m_buf + m_len, buffer, count);
-    m_len += count;
-    return count;
-  }
-
-  size_t write(uint8_t data) override {
-    return write(&data, 1);
-  }
-
-  int available() override {
-    return 0;
-  }
-
-  int read() override {
-    return -1;
-  }
-
-  int peek() override {
-    return -1;
-  }
-
-  void flush() override {}
-
-private:
-  uint8_t* m_buf;
-  size_t m_len;
-  size_t m_cap;
-};
-
-#endif // SPIRAM_OSTREAM_HPP