feat(docs): add local testing instructions for MQTT functionality

Include detailed instructions for local testing of observer and WiFi
functionality without hardware. Document the use of a mock backend and
Wokwi ESP32-S3 simulation for easier development and testing.
Enhance the MQTT implementation documentation to improve developer
experience and facilitate testing workflows.
This commit is contained in:
agessaman
2026-07-18 13:19:27 -07:00
parent b7795720b2
commit cbbd01b620
23 changed files with 1403 additions and 131 deletions
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#!/usr/bin/env python3
"""Local mock of the WebConfig portal backend, for iterating on webui/index.html
in a real browser with no firmware, no flashing, and no paid emulator account.
It serves the real webui/index.html and implements the same /api/* contract as
src/helpers/esp32/WebConfigServer.cpp — including the 202+reqid handshake, the
pending -> done result polling, aggregate-success reboot gating, secret masking
(********), and the IATA / owner-key / length validation the firmware enforces.
So the browser drives the actual portal JS (wizard, save/poll/reqid, effective
value handling, reboot overlay, stats, scan) against realistic responses.
It does NOT run the C++ handlers (that's what test/ gtest covers) or the
AsyncTCP transport — it's a frontend + contract harness.
Usage:
python3 scripts/webconfig_mock_server.py # LAN mode (login: password)
python3 scripts/webconfig_mock_server.py --setup # first-boot setup wizard
python3 scripts/webconfig_mock_server.py --port 9000 --active-slots 2
Then open http://localhost:8080/ (or the chosen port). Editing index.html and
refreshing shows changes immediately — the page is re-read per request.
Stdlib only; no pip install.
"""
import argparse
import copy
import json
import os
import re
import secrets
import threading
import time
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
HERE = os.path.dirname(os.path.abspath(__file__))
INDEX_HTML = os.path.join(HERE, "..", "webui", "index.html")
SENTINEL = "********"
ADMIN_PASSWORD = "password" # matches the default ADMIN_PASSWORD build flag
BATCH_PENDING_SECS = 0.8 # how long POST->done takes, to exercise polling
SCAN_SECS = 0.8
# Destination buffer sizes (chars, minus the NUL) — mirrors the MQTTPrefs fields
# the firmware validates in CommonCLI_Observer.cpp.
LEN_LIMITS = {
"name": 31, "wifi.ssid": 31, "wifi.pwd": 63, "mqtt.origin": 31,
"mqtt.email": 63, "mqtt.ntp": 63, "timezone": 31, "snmp.community": 23,
}
SLOT_LEN_LIMITS = {"server": 63, "username": 31, "password": 63,
"token": 47, "topic": 95, "audience": 63}
# Preset names + what the UI must collect (mirrors handlePresets()).
PRESETS = (
[(n, "none") for n in (
"analyzer-us", "analyzer-eu", "nz-analyzer", "meshmapper", "waev",
"meshomatic", "cascadiamesh", "tennmesh", "nashmesh", "ctmesh", "chimesh",
"meshat.se", "eastidahomesh", "coloradomesh", "dutchmeshcore-1",
"dutchmeshcore-2", "meshcore-ca-1", "meshcore-ca-2", "meshcore-fi",
"bostonmesh", "rflab", "ipnt.uk", "flmesh", "corecomms")]
+ [("meshrank", "token"), ("inwmesh", "userpass")]
)
SCAN_NETWORKS = [
{"ssid": "Wokwi-GUEST", "rssi": -42, "enc": False},
{"ssid": "HomeNet", "rssi": -55, "enc": True},
{"ssid": "HomeNet-5G", "rssi": -61, "enc": True},
{"ssid": "Neighbor 2.4", "rssi": -78, "enc": True},
{"ssid": "OpenGuest", "rssi": -83, "enc": False},
]
def default_config(setup_mode):
return {
"radio": {
"freq": 910.525, "bw": 62.5, "sf": 7, "cr": 5, "tx": 22, "af": 1.0,
"rxdelay": 0.0, "txdelay": 0.5, "cad": False, "rxgain": True,
"repeat": True, "flood_max": 64, "flood_max_advert": 8,
"flood_max_unscoped": 8, "loop_detect": "moderate",
"name": "MockNode", "lat": 39.7392, "lon": -104.9903,
"advert_interval": 240, "flood_advert_interval": 6,
},
"wifi": {
# setup mode = unconfigured (empty ssid -> wizard); LAN mode = joined
"ssid": "" if setup_mode else "HomeNet",
"pwd": "" if setup_mode else "secretpw", # stored raw; masked on GET
"powersave": "min",
},
"mqtt": {
"origin": "" if setup_mode else "MockNode", "iata": "" if setup_mode else "DEN",
"status": True, "packets": True, "raw": False, "tx": "advert", "rx": True,
"interval": 5, "timezone": "MST7MDT,M3.2.0,M11.1.0", "timezone_offset": -7,
"ntp": "pool.ntp.org", "owner": "", "email": "", "snmp": False,
"snmp_community": "public",
"slots": [_slot() for _ in range(6)],
},
}
def _slot():
return {"preset": "none", "server": "", "port": 8883, "username": "",
"password": "", "token": "", "topic": "", "audience": ""}
class State:
def __init__(self, args):
self.lock = threading.Lock()
self.setup_mode = args.setup
self.active_slots = args.active_slots
self.cfg = default_config(args.setup)
self.start = time.time()
self.session = None # cookie token when logged in (LAN mode)
self.batch = {"state": "idle"}
self.scan_started = None
# ---- auth -------------------------------------------------------------
def is_authed(self, headers):
if self.setup_mode:
return True # setup mode: proximity trust, no auth
if not self.session:
return False
cookie = headers.get("Cookie", "")
m = re.search(r"wcs=([0-9a-f]+)", cookie)
return bool(m and m.group(1) == self.session)
# ---- config serialization (masks secrets, like handleConfigGet) -------
def config_json(self):
c = copy.deepcopy(self.cfg)
c["wifi"]["pwd"] = SENTINEL if self.cfg["wifi"]["pwd"] else ""
for s in c["mqtt"]["slots"]:
s["password"] = SENTINEL if s["password"] else ""
s["token"] = SENTINEL if s["token"] else ""
return c
def status_json(self, authed):
return {
"mode": "setup" if self.setup_mode else "lan",
"auth": authed,
"needs_setup": self.cfg["wifi"]["ssid"] == "",
"name": self.cfg["radio"]["name"], "node_id": "a1b2c3d4e5f60718",
"fw": "v1.7.1-mock", "role": "Repeater", "board": "Heltec V3 (mock)",
"uptime_s": int(time.time() - self.start),
"runtime_slots": 6, "max_slots": 6, "active_slots": self.active_slots,
}
# ---------------------------------------------------------------------------
# set-command application + validation (mirrors the firmware's setters enough
# to produce realistic per-field OK / Error replies for the UI chips).
# ---------------------------------------------------------------------------
BOOL_KEYS = {"cad": ("radio", "cad"), "radio.rxgain": ("radio", "rxgain"),
"repeat": ("radio", "repeat"), "mqtt.status": ("mqtt", "status"),
"mqtt.packets": ("mqtt", "packets"), "mqtt.raw": ("mqtt", "raw"),
"mqtt.rx": ("mqtt", "rx"), "snmp": ("mqtt", "snmp")}
INT_KEYS = {"tx": ("radio", "tx"), "flood.max": ("radio", "flood_max"),
"flood.max.advert": ("radio", "flood_max_advert"),
"flood.max.unscoped": ("radio", "flood_max_unscoped"),
"advert.interval": ("radio", "advert_interval"),
"flood.advert.interval": ("radio", "flood_advert_interval"),
"mqtt.interval": ("mqtt", "interval"),
"timezone.offset": ("mqtt", "timezone_offset")}
FLOAT_KEYS = {"lat": ("radio", "lat"), "lon": ("radio", "lon"),
"af": ("radio", "af"), "rxdelay": ("radio", "rxdelay"),
"txdelay": ("radio", "txdelay")}
STR_KEYS = {"name": ("radio", "name"), "wifi.ssid": ("wifi", "ssid"),
"wifi.powersave": ("wifi", "powersave"), "loop.detect": ("radio", "loop_detect"),
"mqtt.origin": ("mqtt", "origin"), "mqtt.ntp": ("mqtt", "ntp"),
"mqtt.email": ("mqtt", "email"), "timezone": ("mqtt", "timezone"),
"snmp.community": ("mqtt", "snmp_community"), "mqtt.tx": ("mqtt", "tx")}
SECRET_STR_KEYS = {"wifi.pwd": ("wifi", "pwd")}
def _hex64(v):
return len(v) == 64 and all(c in "0123456789abcdefABCDEF" for c in v)
def apply_set(cfg, key, val):
"""Return (ok, reply) and mutate cfg. Mirrors the firmware's validation for
the fields where it matters (length, IATA, owner key, port, radio combo)."""
# length guard for the plain string fields
if key in LEN_LIMITS and len(val) > LEN_LIMITS[key]:
return False, "Error: %s too long (max %d chars)" % (key, LEN_LIMITS[key])
if key == "radio":
try:
f, bw, sf, cr = val.split(",")
f, bw, sf, cr = float(f), float(bw), int(sf), int(cr)
except ValueError:
return False, "Error, invalid radio params"
if not (150 <= f <= 2500 and 7 <= bw <= 500 and 5 <= sf <= 12 and 5 <= cr <= 8):
return False, "Error, invalid radio params"
cfg["radio"].update(freq=f, bw=bw, sf=sf, cr=cr)
return True, "OK - reboot to apply"
if key == "mqtt.iata":
if val == "":
cfg["mqtt"]["iata"] = ""
return True, "OK - IATA cleared"
if len(val) != 3 or not val.isalnum() or not val.isascii():
return False, "Error: IATA code must be exactly 3 letters/digits (e.g. DEN)"
cfg["mqtt"]["iata"] = val.upper()
return True, "OK"
if key == "mqtt.owner":
if val == "":
cfg["mqtt"]["owner"] = ""
return True, "OK - owner key cleared"
if not _hex64(val):
return False, "Error: public key must be 64 hex characters (32 bytes)"
cfg["mqtt"]["owner"] = val
return True, "OK"
m = re.match(r"^mqtt([1-6])\.(\w+)$", key)
if m:
return apply_slot_set(cfg, int(m.group(1)) - 1, m.group(2), val)
if key in BOOL_KEYS:
sec, f = BOOL_KEYS[key]
cfg[sec][f] = (val == "on")
return True, "OK"
if key in INT_KEYS:
sec, f = INT_KEYS[key]
try:
cfg[sec][f] = int(val)
except ValueError:
return False, "Error: expected a number"
return True, "OK"
if key in FLOAT_KEYS:
sec, f = FLOAT_KEYS[key]
try:
cfg[sec][f] = float(val)
except ValueError:
return False, "Error: expected a number"
return True, "OK"
if key in SECRET_STR_KEYS:
sec, f = SECRET_STR_KEYS[key]
cfg[sec][f] = val
return True, "OK"
if key in STR_KEYS:
sec, f = STR_KEYS[key]
cfg[sec][f] = val
return True, "OK"
return True, "OK" # unknown-but-allowlisted: accept (mock is lenient here)
def apply_slot_set(cfg, idx, field, val):
slot = cfg["mqtt"]["slots"][idx]
if field in SLOT_LEN_LIMITS and len(val) > SLOT_LEN_LIMITS[field]:
return False, "Error: %s too long (max %d chars)" % (field, SLOT_LEN_LIMITS[field])
if field == "port":
try:
p = int(val)
except ValueError:
return False, "Error: port must be between 1 and 65535"
if not (1 <= p <= 65535):
return False, "Error: port must be between 1 and 65535"
slot["port"] = p
return True, "OK"
if field in ("preset", "server", "username", "password", "token", "topic", "audience"):
slot[field] = val
if field == "token":
return True, "OK - slot %d token set" % (idx + 1)
return True, "OK"
return False, "Error: unknown slot field"
def is_secret_key(key):
return key == "wifi.pwd" or bool(re.match(r"^mqtt[1-6]\.(password|token)$", key))
# ---------------------------------------------------------------------------
# HTTP handler
# ---------------------------------------------------------------------------
class Handler(BaseHTTPRequestHandler):
protocol_version = "HTTP/1.1"
def log_message(self, fmt, *args): # concise one-line log
print(" %s %s" % (self.command, self.path))
# -- helpers --
def _json(self, code, obj, extra_headers=None):
body = json.dumps(obj).encode()
self.send_response(code)
self.send_header("Content-Type", "application/json")
self.send_header("Content-Length", str(len(body)))
self.send_header("Cache-Control", "no-store")
for k, v in (extra_headers or {}):
self.send_header(k, v)
self.end_headers()
self.wfile.write(body)
def _read_body(self):
n = int(self.headers.get("Content-Length", 0))
return self.rfile.read(n) if n else b""
def _need_auth(self):
if not ST.is_authed(self.headers):
self._json(401, {"error": "auth"})
return True
return False
# -- GET --
def do_GET(self):
path = self.path.split("?", 1)[0]
if path == "/":
return self._serve_index()
if path == "/api/status":
return self._json(200, ST.status_json(ST.is_authed(self.headers)))
if path == "/api/presets":
return self._json(200, {"presets": [{"name": n, "needs": nd} for n, nd in PRESETS]})
if path == "/api/config":
if self._need_auth():
return
with ST.lock:
return self._json(200, ST.config_json())
if path == "/api/config/result":
if self._need_auth():
return
return self._config_result()
if path == "/api/stats":
if self._need_auth():
return
return self._json(200, self._stats())
if path == "/api/scan":
if self._need_auth():
return
return self._scan()
return self._json(404, {"error": "not found"})
# -- POST --
def do_POST(self):
path = self.path.split("?", 1)[0]
if path == "/api/login":
return self._login()
if path == "/api/logout":
ST.session = None
return self._json(200, {"ok": True}, [("Set-Cookie", "wcs=; Max-Age=0; Path=/")])
if path == "/api/config":
if self._need_auth():
return
return self._config_post()
if path == "/api/reboot":
if self._need_auth():
return
return self._json(200, {"ok": True})
if path == "/api/portal/exit":
return self._json(200, {"ok": True, "url": "http://localhost:%d/" % PORT})
return self._json(404, {"error": "not found"})
# -- endpoint impls --
def _serve_index(self):
try:
with open(INDEX_HTML, "rb") as f: # re-read each time -> live edits
html = f.read()
except OSError:
self.send_error(500, "webui/index.html not found")
return
self.send_response(200)
self.send_header("Content-Type", "text/html; charset=utf-8")
self.send_header("Content-Length", str(len(html)))
self.send_header("Cache-Control", "no-store")
self.end_headers()
self.wfile.write(html)
def _login(self):
if ST.setup_mode:
return self._json(200, {"ok": True})
try:
body = json.loads(self._read_body() or b"{}")
except ValueError:
return self._json(400, {"error": "bad request"})
if body.get("password") != ADMIN_PASSWORD:
return self._json(401, {"error": "wrong password"})
ST.session = secrets.token_hex(16)
return self._json(200, {"ok": True},
[("Set-Cookie", "wcs=%s; HttpOnly; SameSite=Lax; Path=/" % ST.session)])
def _config_post(self):
raw = self._read_body()
if len(raw) > 4096:
return self._json(413, {"error": "body too large"})
try:
body = json.loads(raw or b"{}")
except ValueError:
return self._json(400, {"error": "bad json"})
reqid = body.get("reqid", "")
reboot = bool(body.get("reboot", False))
setmap = body.get("set", {}) or {}
with ST.lock:
if ST.batch.get("state") == "pending":
return self._json(409, {"error": "busy", "reqid": ST.batch.get("reqid", "")})
# drop unchanged secrets (sentinel), like the firmware does
entries = [(k, v) for k, v in setmap.items()
if not (is_secret_key(k) and v == SENTINEL)]
if not entries and not reboot:
return self._json(400, {"error": "no changes"})
# apply now, but expose as pending->done to exercise polling
results, all_ok = [], True
for k, v in entries:
ok, reply = apply_set(ST.cfg, k, str(v))
if not ok:
all_ok = False
results.append({"key": k, "reply": reply})
ST.batch = {"state": "pending", "reqid": reqid, "results": results,
"all_ok": all_ok, "reboot": reboot,
"done_at": time.time() + BATCH_PENDING_SECS}
return self._json(202, {"state": "pending", "count": len(entries), "reqid": reqid})
def _config_result(self):
with ST.lock:
b = ST.batch
if b.get("state") == "idle":
return self._json(200, {"state": "idle"})
if b["state"] == "pending" and time.time() < b["done_at"]:
return self._json(200, {"state": "pending", "reqid": b["reqid"]})
b["state"] = "done" # stays readable until next POST
return self._json(200, {
"state": "done", "reqid": b["reqid"], "all_ok": b["all_ok"],
"reboot": b["reboot"] and b["all_ok"], "results": b["results"],
})
def _scan(self):
rescan = "rescan=1" in self.path
now = time.time()
if rescan or ST.scan_started is None:
ST.scan_started = now
return self._json(200, {"state": "scanning"})
if now - ST.scan_started < SCAN_SECS:
return self._json(200, {"state": "scanning"})
return self._json(200, {"state": "done", "networks": SCAN_NETWORKS})
def _stats(self):
up = int(time.time() - ST.start)
slots = []
for i, s in enumerate(ST.cfg["mqtt"]["slots"]):
if s["preset"] == "none":
continue
slots.append({"n": i + 1, "name": s["preset"], "state": "ok",
"ok": 100 + up, "err": 0})
return {
"uptime_s": up, "batt_mv": 4020, "heap_free": 142000, "heap_min": 118000,
"heap_max_alloc": 96000, "noise": -98, "rssi": -71, "snr": 9.5,
"airtime_s": up // 20, "rx_airtime_s": up // 8, "recv": 512 + up,
"sent": 88 + up // 3, "rx_err": 3, "sent_flood": 40, "sent_direct": 48,
"recv_flood": 300, "recv_direct": 212, "tx_queue": 0, "mqtt_queue": 0,
"wifi_rssi": -58, "ip": "192.168.1.42", "slots": slots,
}
def main():
global ST, PORT
ap = argparse.ArgumentParser(description="Mock WebConfig portal backend")
ap.add_argument("--port", type=int, default=8080)
ap.add_argument("--setup", action="store_true", help="first-boot setup wizard mode")
ap.add_argument("--active-slots", type=int, default=5, help="server slots to expose (2 or 5)")
args = ap.parse_args()
ST, PORT = State(args), args.port
srv = ThreadingHTTPServer(("127.0.0.1", args.port), Handler)
mode = "SETUP (wizard)" if args.setup else "LAN (login: %s)" % ADMIN_PASSWORD
print("WebConfig mock backend — %s" % mode)
print(" open http://localhost:%d/ (Ctrl-C to stop)" % args.port)
try:
srv.serve_forever()
except KeyboardInterrupt:
print("\nstopped")
if __name__ == "__main__":
main()