ESA energy enable patch during build.

environments.ini

@@ -1051,6 +1051,11 @@ build_flags =
 custom_description = Gateway using RTL_433_ESP and RadioLib
 custom_hardware = ESP32 HELTEC LORA32 V2
 custom_img = img/boards/heltec-wifi-lora-32.png
+; *** Re-enable rtl_433_ESP decoders disabled by default in the library ***
+extra_scripts =
+  ${env.extra_scripts}
+  scripts/enable_rtl433_decoders.py
+custom_rtl_433_enable_decoders = esa_energy
 
 [env:heltec-rtl_433-fsk]
 platform = ${com.esp32_platform}

scripts/enable_rtl433_decoders.py

@@ -0,0 +1,73 @@
+# Re-enable rtl_433_ESP decoders that are disabled by default in the library.
+#
+# Newer rtl_433_ESP releases mark some decoders with `.disabled = 1` (e.g.
+# `esa_energy` since v0.6.x) and there is no build flag to turn them back on.
+# This script patches the decoder definitions inside the downloaded library in
+# .pio/libdeps/<env>/ before compilation.
+#
+# Usage (in the environment section):
+#   extra_scripts =
+#     ${env.extra_scripts}
+#     scripts/enable_rtl433_decoders.py
+#   custom_rtl_433_enable_decoders = esa_energy
+#
+# Must run as a normal (post) script: lib_deps are installed while the platform
+# builder script runs, so a "pre:" script would not find the library on a clean
+# build. Sources are only compiled after all scripts have been read, and SCons
+# recompiles patched files because their content changed.
+import glob
+import os
+import re
+
+Import("env")
+
+
+def enable_decoders(libdeps_dir, decoders):
+    """Patch `.disabled = N` to `.disabled = 0` for the given r_device names.
+
+    Returns a dict decoder -> status ("enabled", "already enabled", "not found").
+    """
+    device_files = glob.glob(
+        os.path.join(libdeps_dir, "**", "src", "rtl_433", "devices", "*.c"),
+        recursive=True,
+    )
+    result = {name: "not found" for name in decoders}
+    for path in device_files:
+        with open(path, "r", encoding="utf-8", newline="") as f:
+            content = f.read()
+        changed = False
+        for name in decoders:
+            block_re = re.compile(
+                r"(r_device\s+const\s+" + re.escape(name) + r"\s*=\s*\{)(.*?)(\};)",
+                re.DOTALL,
+            )
+            match = block_re.search(content)
+            if not match:
+                continue
+            body = match.group(2)
+            new_body, count = re.subn(
+                r"(\.disabled\s*=\s*)[1-9]\d*", r"\g<1>0", body
+            )
+            if count:
+                content = content[: match.start(2)] + new_body + content[match.end(2):]
+                changed = True
+                result[name] = "enabled"
+            else:
+                result[name] = "already enabled"
+        if changed:
+            with open(path, "w", encoding="utf-8", newline="") as f:
+                f.write(content)
+    return result
+
+
+decoders = env.GetProjectOption("custom_rtl_433_enable_decoders", "").split()
+if decoders:
+    libdeps_dir = os.path.join(env.subst("$PROJECT_LIBDEPS_DIR"), env.subst("$PIOENV"))
+    status = enable_decoders(libdeps_dir, decoders)
+    for name, state in status.items():
+        print("rtl_433_ESP decoder %s: %s" % (name, state))
+    missing = [name for name, state in status.items() if state == "not found"]
+    if missing:
+        print("Error: rtl_433_ESP decoder(s) not found in %s: %s" % (libdeps_dir, ", ".join(missing)))
+        env.Exit(1)
+