From d1e6d3dfe669796826b21b7e42c95ee32f73041f Mon Sep 17 00:00:00 2001
From: "Adrian A. Baumann" <ade@adebaumann.com>
Date: Wed, 22 Apr 2026 00:09:01 +0200
Subject: [PATCH] OTA deleted from memory after done

---
 boot.py | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 boot.py

diff --git a/boot.py b/boot.py
new file mode 100644
index 0000000..3a81e9e
--- /dev/null
+++ b/boot.py
@@ -0,0 +1,64 @@
+"""
+boot.py — runs before main.py on every ESP32 boot
+
+Connects WiFi, runs OTA update, then hands off to main.py.
+Keep this file as simple as possible — it is never OTA-updated itself
+(it lives outside the repo folder) so bugs here require USB to fix.
+"""
+import gauge
+import network
+import gc
+import utime
+import sys
+
+import ota
+
+ota.load_config()
+WIFI_SSID, WIFI_PASSWORD = ota.WIFI_SSID, ota.WIFI_PASSWORD
+
+def _connect_wifi(timeout_s=20):
+    sta = network.WLAN(network.STA_IF)
+    sta.active(True)
+    sta.config(txpower=15)
+    if sta.isconnected():
+        return True
+    sta.connect(WIFI_SSID, WIFI_PASSWORD)
+    deadline = utime.time() + timeout_s
+    while not sta.isconnected():
+        if utime.time() > deadline:
+            return False
+        utime.sleep_ms(300)
+    return True
+
+if WIFI_SSID is None:
+    print("[boot] No WiFi credentials — cannot connect, skipping OTA")
+elif _connect_wifi():
+    ip = network.WLAN(network.STA_IF).ifconfig()[0]
+    print(f"[boot] WiFi connected — {ip}")
+
+    try:
+        ota.update()
+    except Exception as e:
+        print(f"[boot] OTA error: {e} — continuing with existing files")
+        sys.print_exception(e)
+    utime.sleep_ms(5000)
+    ota._fetch_commit_sha = None
+    ota._fetch_manifest = None
+    ota._fetch_dir = None
+    ota._api_get = None
+    ota._download = None
+    ota.urequests = None
+    del ota.urequests
+    del ota
+    gc.collect()
+    del sys.modules["ota"]
+    gc.collect()
+
+else:
+    print("[boot] WiFi failed — skipping OTA, booting with existing files")
+
+# main.py runs automatically after boot.py
+
+
+
+