fix(bot): !temp and {temp} fall back to the chip's temperature

Same gap as the screens had: the bot reply, a typed message's {temp} and
the placeholder lists read only the sensors, so a board without one (the
L1) answered !temp with n/a while its telemetry carried a temperature.
The fallback moves to LocalSensors.h, shared by the screens, expandMsg()
and sensorPlaceholders(); the latter now takes the chip's temperature.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/companion_radio/LocalSensors.h

@@ -0,0 +1,22 @@
+#pragma once
+// This device's own readings, as the screens, the bot and message placeholders
+// read them.
+
+#include <math.h>
+#include <helpers/SensorManager.h>
+#include <helpers/sensors/LPPDataHelpers.h>
+
+// The sensors' readings, plus the chip's own temperature (NaN where a board has
+// none) when no sensor reads one: the telemetry reply sends it too, so a board
+// without a temperature sensor shows on screen and in {temp} what the app shows.
+inline void queryLocalSensors(SensorManager& sm, float mcu_temp, CayenneLPP& lpp) {
+  sm.querySensors(0xFF, lpp);
+  if (isnan(mcu_temp)) return;
+  LPPReader r(lpp.getBuffer(), lpp.getSize());
+  uint8_t ch, type;
+  while (r.readHeader(ch, type)) {
+    if (type == LPP_TEMPERATURE) return;
+    r.skipData(type);
+  }
+  lpp.addTemperature(TELEM_CHANNEL_SELF, mcu_temp);
+}

examples/companion_radio/MsgExpand.h

@@ -6,6 +6,7 @@
 #include <helpers/SensorManager.h>
 #include "NodePrefs.h"   // localTm()
 #include <helpers/sensors/LPPDataHelpers.h>
+#include "LocalSensors.h"
 
 // Expands placeholders in tmpl into out (out_len bytes).
 //   {loc}   — GPS coordinates (lat/lon) or "no GPS"
@@ -26,14 +27,15 @@ inline void expandMsg(const char* tmpl, char* out, int out_len,
                       SensorManager* sm = nullptr,
                       float batt_volts  = -1.0f,
                       const char* sender_name = nullptr,
-                      int hops = -1) {
+                      int hops = -1,
+                      float mcu_temp = NAN) {   // the chip's, for {temp} without a sensor
   // sv indices: 0=temp 1=hum 2=pres 3=batt 4=alt 5=lux 6=dist 7=co2
   float sv[8]    = {};
   bool  sv_ok[8] = {};
 
   if (sm) {
     CayenneLPP lpp(100);
-    sm->querySensors(0xFF, lpp);
+    queryLocalSensors(*sm, mcu_temp, lpp);
     LPPReader r(lpp.getBuffer(), lpp.getSize());
     uint8_t ch, type;
     while (r.readHeader(ch, type)) {

examples/companion_radio/MyMeshBot.h

@@ -143,7 +143,7 @@ void MyMesh::tryBotReplyDM(const ContactInfo& from, const char* text, uint8_t ho
             sensors.node_lat != 0.0 || sensors.node_lon != 0.0,
             ts, _prefs.tz_offset_hours,
             &sensors, (float)board.getBattMilliVolts() / 1000.0f,
-            from.name, hops);
+            from.name, hops, board.getMCUTemperature());
   uint32_t expected_ack, est_timeout;
   if (sendMessage(from, ts, 0, expanded, expected_ack, est_timeout) != MSG_SEND_FAILED) {
     botDmRecord(from.id.pub_key);
@@ -184,7 +184,7 @@ void MyMesh::tryBotReplyChannel(uint8_t channel_idx, const char* text, uint8_t h
             sensors.node_lat != 0.0 || sensors.node_lon != 0.0,
             ts, _prefs.tz_offset_hours,
             &sensors, (float)board.getBattMilliVolts() / 1000.0f,
-            sender_name, hops);
+            sender_name, hops, board.getMCUTemperature());
   // Anti-loop: don't echo a message identical to our own reply (e.g. another bot
   // on the channel sending the same text), which would ping-pong forever. The
   // per-channel cooldown caps any residual back-and-forth between mismatched bots.
@@ -228,7 +228,7 @@ void MyMesh::tryBotReplyRoom(const ContactInfo& from, const uint8_t* sender_pref
             sensors.node_lat != 0.0 || sensors.node_lon != 0.0,
             ts, _prefs.tz_offset_hours,
             &sensors, (float)board.getBattMilliVolts() / 1000.0f,
-            sender_name, hops);
+            sender_name, hops, board.getMCUTemperature());
   // Anti-loop, mirrors the channel path: don't echo a message identical to
   // our own reply (e.g. re-synced back from the room server).
   if (strcmp(text, expanded) == 0) return;
@@ -367,7 +367,7 @@ bool MyMesh::botCommandReply(const char* cmd, const char* arg, const char* arg2,
             sensors.node_lat != 0.0 || sensors.node_lon != 0.0,
             ts, _prefs.tz_offset_hours,
             &sensors, (float)board.getBattMilliVolts() / 1000.0f,
-            sender_name, hops);
+            sender_name, hops, board.getMCUTemperature());
   if (strchr(out, '{')) strcpy(out, "n/a");      // requested sensor not present
   return true;
 }

examples/companion_radio/ui-core/MessageText.h

@@ -35,11 +35,11 @@ static void seedQuick(NodePrefs* p) {
 // ── Placeholders ──────────────────────────────────────────────────────────────
 
 // The sensor readings this device has right now, as placeholders ({temp},
-// {hum}, ...; {batt} only from a voltage sensor).
-static void sensorPlaceholders(SensorManager* sm, void (*add)(const char* ph, void* ctx), void* ctx) {
+// {hum}, ...; {batt} only from a voltage sensor; {temp} also from the chip, mcu_temp).
+static void sensorPlaceholders(SensorManager* sm, float mcu_temp, void (*add)(const char* ph, void* ctx), void* ctx) {
   if (!sm) return;
   CayenneLPP lpp(100);
-  sm->querySensors(0xFF, lpp);
+  queryLocalSensors(*sm, mcu_temp, lpp);
   uint8_t present[16];
   int pc = 0;
   LPPReader r(lpp.getBuffer(), lpp.getSize());
@@ -62,12 +62,12 @@ static void sensorPlaceholders(SensorManager* sm, void (*add)(const char* ph, vo
 
 // Everything a message can carry here: {loc}, {time}, {batt} (the board's
 // voltage), then the sensors'.
-static void placeholders(SensorManager* sm, void (*add)(const char* ph, void* ctx), void* ctx) {
+static void placeholders(SensorManager* sm, float mcu_temp, void (*add)(const char* ph, void* ctx), void* ctx) {
   add("{loc}", ctx);
   add("{time}", ctx);
   add("{batt}", ctx);
   struct Skip { void (*add)(const char*, void*); void* ctx; } skip = { add, ctx };
-  sensorPlaceholders(sm, [](const char* ph, void* c) {
+  sensorPlaceholders(sm, mcu_temp, [](const char* ph, void* c) {
     Skip* s = (Skip*)c;
     if (strcmp(ph, "{batt}") != 0) s->add(ph, s->ctx);   // already there
   }, &skip);
@@ -89,7 +89,7 @@ static void expand(const char* tmpl, char* out, int n, const NodePrefs* p) {
 #endif
   float batt = (float)board.getBattMilliVolts() / 1000.0f;
   ::expandMsg(tmpl, out, n, lat, lon, gps_valid, rtc_clock.getCurrentTime(),
-              p ? p->tz_offset_hours : 0, &sensors, batt);
+              p ? p->tz_offset_hours : 0, &sensors, batt, nullptr, -1, board.getMCUTemperature());
 }
 
 // A typed message: a reply's leading "@[nick] " stays as it is (a nick may

examples/companion_radio/ui-core/Telemetry.h

@@ -7,8 +7,6 @@
 
 #include <stdint.h>
 #include <stdio.h>
-#include <math.h>
-#include <helpers/SensorManager.h>
 #include <helpers/sensors/LPPDataHelpers.h>
 #include <helpers/sensors/LocationProvider.h>
 #include "Battery.h"
@@ -66,21 +64,6 @@ static uint8_t lppType(uint8_t f) {
 // Read from the sensors, not the radio or GPS.
 static bool isSensor(uint8_t f) { return lppType(f) != 0; }
 
-// The sensors' readings, plus the chip's own temperature (NaN where a board has
-// none) when no sensor reads one: the telemetry reply sends it too, so a board
-// without a temperature sensor shows on screen what the app shows.
-static void querySensors(SensorManager& sm, float mcu_temp, CayenneLPP& lpp) {
-  sm.querySensors(0xFF, lpp);
-  if (isnan(mcu_temp)) return;
-  LPPReader r(lpp.getBuffer(), lpp.getSize());
-  uint8_t ch, type;
-  while (r.readHeader(ch, type)) {
-    if (type == LPP_TEMPERATURE) return;
-    r.skipData(type);
-  }
-  lpp.addTemperature(TELEM_CHANNEL_SELF, mcu_temp);
-}
-
 // Altitude always in the small unit (never km / mi).
 static void altText(float m, bool imperial, const Style& st, char* v, int n) {
   snprintf(v, n, "%.0f%s%s", imperial ? m * 3.28084f : m, st.spaced ? " " : "", imperial ? "ft" : "m");

examples/companion_radio/ui-lvgl/BotScreen.h

@@ -175,7 +175,7 @@ void UITask::botRow(int row) {
       lv_obj_set_scrollbar_mode(chips, LV_SCROLLBAR_MODE_OFF);
       s_chip_ta = _nav_ta;
       for (int i = 0; i < botcfg::REPLY_PLACEHOLDER_COUNT; i++) botChip(botcfg::REPLY_PLACEHOLDERS[i], chips);
-      msgtext::sensorPlaceholders(&sensors, [](const char* ph, void* c) {
+      msgtext::sensorPlaceholders(&sensors, board.getMCUTemperature(), [](const char* ph, void* c) {
         if (strcmp(ph, "{batt}") != 0) botChip(ph, c);   // already there
       }, chips);
     }

examples/companion_radio/ui-lvgl/HomeScreen.h

@@ -621,7 +621,7 @@ void UITask::homeFieldText(uint8_t f, char* v, int n) {
     if (_sensors && (s_lpp_ms == 0 || millis() - s_lpp_ms > 5000)) {
       s_lpp_ms = millis() | 1;
       s_lpp.reset();
-      telemetry::querySensors(*_sensors, board.getMCUTemperature(), s_lpp);
+      queryLocalSensors(*_sensors, board.getMCUTemperature(), s_lpp);
     }
     in.lpp = s_lpp.getBuffer();
     in.lpp_len = s_lpp.getSize();

examples/companion_radio/ui-lvgl/QuickScreen.h

@@ -12,7 +12,7 @@ static int s_edit = -1;            // quick message being edited
 
 static void collect() {
   s_ph_n = 0;
-  msgtext::placeholders(&sensors, [](const char* ph, void*) { if (s_ph_n < PH_MAX) s_ph[s_ph_n++] = ph; }, nullptr);
+  msgtext::placeholders(&sensors, board.getMCUTemperature(), [](const char* ph, void*) { if (s_ph_n < PH_MAX) s_ph[s_ph_n++] = ph; }, nullptr);
 }
 
 // The placeholders as small buttons; `cb` gets the index as user data.

examples/companion_radio/ui-new/HomeScreen.h

@@ -102,7 +102,7 @@ static void formatDashVal(uint8_t field, char* val, int val_len, uint16_t batt_m
   if (telemetry::isSensor(field)) {
     if (!lpp) {
       static CayenneLPP s_lpp(200); s_lpp.reset();
-      { CardKBBusLock bus_lock; telemetry::querySensors(sensors, board.getMCUTemperature(), s_lpp); }
+      { CardKBBusLock bus_lock; queryLocalSensors(sensors, board.getMCUTemperature(), s_lpp); }
       lpp = &s_lpp;
     }
     in.lpp = lpp->getBuffer();
@@ -652,7 +652,7 @@ class HomeScreen : public UIScreen {
       sensors_lpp.reset();
       sensors_nb = 0;
       sensors_lpp.addVoltage(TELEM_CHANNEL_SELF, (float)board.getBattMilliVolts() / 1000.0f);
-      { CardKBBusLock bus_lock; telemetry::querySensors(sensors, board.getMCUTemperature(), sensors_lpp); }
+      { CardKBBusLock bus_lock; queryLocalSensors(sensors, board.getMCUTemperature(), sensors_lpp); }
       LPPReader reader (sensors_lpp.getBuffer(), sensors_lpp.getSize());
       uint8_t channel, type;
       while(reader.readHeader(channel, type)) {

examples/companion_radio/ui-new/SensorPlaceholders.h

@@ -8,5 +8,5 @@
 #include <helpers/sensors/LPPDataHelpers.h>
 
 inline void kbAddSensorPlaceholders(KeyboardWidget& kb, SensorManager* sm) {   // list: ui-core/MessageText.h
-  msgtext::sensorPlaceholders(sm, [](const char* ph, void* k) { ((KeyboardWidget*)k)->addPlaceholder(ph); }, &kb);
+  msgtext::sensorPlaceholders(sm, board.getMCUTemperature(), [](const char* ph, void* k) { ((KeyboardWidget*)k)->addPlaceholder(ph); }, &kb);
 }

examples/companion_radio/ui-new/StatusScreen.h

@@ -237,7 +237,7 @@ private:
     // Sensors: every reading but the battery (above) and the position (GPS).
     if (!_lpp_at || millis() - _lpp_at > 5000) {   // both passes (measure, draw) read one query
       _lpp.reset();
-      { CardKBBusLock bus_lock; telemetry::querySensors(sensors, board.getMCUTemperature(), _lpp); }   // shares the CardKB's bus
+      { CardKBBusLock bus_lock; queryLocalSensors(sensors, board.getMCUTemperature(), _lpp); }   // shares the CardKB's bus
       _lpp_at = millis() | 1;
     }
     static const struct { uint8_t type; const char* name; } NAMES[] = {