feat(ui): MeshCore RF frequency-plan presets by country + Custom entry

The RF section shipped as four bare fields; restore a prepopulated plan
list (dropdown) with Custom unlocking free entry, per operator direction.
Preset labels carry the full values, so the number fields render only in
Custom mode — no duplicated display. Presets limited to verifiable
sources: the repo's MeshCore community plans (EU 868/433), the MeshCore
firmware's own build defaults (platformio.ini arduino_base 869.618/62.5/
SF8 CR5; companion example 915.0/250/SF10/CR5), and the operator-attested
Portugal plan (869.618/62.5/SF8/CR8). Stored params are matched back to a
named preset on load; hand-editing flips the dropdown to Custom.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/utils/loraRegions.ts

@@ -100,3 +100,29 @@ export function meshcorePlanFor(code: string | null | undefined): MeshcorePlan |
   if (!code) return undefined
   return MESHCORE_PLANS[code.toUpperCase()]
 }
+
+/** A named MeshCore RF preset for the Device-panel dropdown. */
+export interface MeshcoreRfPreset {
+  id: string
+  label: string
+  freqMhz: number
+  bwKhz: number
+  sf: number
+  cr: number
+}
+
+/**
+ * Prepopulated MeshCore RF plans by country/region for the Device panel's
+ * preset dropdown ("Custom" in the UI unlocks free entry). Values are only
+ * added here when verifiable: the MeshCore community plans above, the
+ * MeshCore firmware's own build defaults (platformio.ini `arduino_base`:
+ * 869.618/62.5/SF8, CR default 5; companion example: 915.0/250/SF10/CR5),
+ * and operator-attested deployment plans.
+ */
+export const MESHCORE_RF_PRESETS: MeshcoreRfPreset[] = [
+  { id: 'eu_868', label: 'Europe / UK — 869.525 MHz, 250 kHz, SF11, CR4/5', freqMhz: 869.525, bwKhz: 250, sf: 11, cr: 5 },
+  { id: 'pt', label: 'Portugal — 869.618 MHz, 62.5 kHz, SF8, CR4/8', freqMhz: 869.618, bwKhz: 62.5, sf: 8, cr: 8 },
+  { id: 'fw_default', label: 'MeshCore firmware default — 869.618 MHz, 62.5 kHz, SF8, CR4/5', freqMhz: 869.618, bwKhz: 62.5, sf: 8, cr: 5 },
+  { id: 'us_anz_915', label: 'US / Canada / ANZ — 915.0 MHz, 250 kHz, SF10, CR4/5', freqMhz: 915.0, bwKhz: 250, sf: 10, cr: 5 },
+  { id: 'eu_433', label: 'Europe (433 MHz) — 433.65 MHz, 250 kHz, SF11, CR4/5', freqMhz: 433.65, bwKhz: 250, sf: 11, cr: 5 },
+]

neode-ui/src/views/mesh/MeshDevicePanel.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, computed, watch } from 'vue'
 import { useMeshStore } from '@/stores/mesh'
-import { LORA_REGIONS, regionByCode, meshcorePlanFor } from '@/utils/loraRegions'
+import { LORA_REGIONS, regionByCode, meshcorePlanFor, MESHCORE_RF_PRESETS } from '@/utils/loraRegions'
 
 const mesh = useMeshStore()
 
@@ -54,15 +54,49 @@ watch(
       | null
       | undefined
     if (rp) {
+      applyingPreset = true
       form.value.rfFreqMhz = String(rp.freq_khz / 1000)
       form.value.rfBwKhz = String(rp.bw_hz / 1000)
       form.value.rfSf = String(rp.sf)
       form.value.rfCr = String(rp.cr)
+      // Show the matching named preset if the stored values are one; else Custom.
+      const match = MESHCORE_RF_PRESETS.find(
+        (p) =>
+          Math.round(p.freqMhz * 1000) === rp.freq_khz &&
+          Math.round(p.bwKhz * 1000) === rp.bw_hz &&
+          p.sf === rp.sf &&
+          p.cr === rp.cr,
+      )
+      rfPreset.value = match ? match.id : 'custom'
+      applyingPreset = false
     }
   },
   { immediate: true },
 )
 
+// RF preset dropdown: picking a named plan fills the four fields; hand-editing
+// any field flips the dropdown to Custom so it never misrepresents the values.
+const rfPreset = ref('')
+let applyingPreset = false
+function selectRfPreset(id: string) {
+  rfPreset.value = id
+  if (id === 'custom' || id === '') return
+  const p = MESHCORE_RF_PRESETS.find((x) => x.id === id)
+  if (!p) return
+  applyingPreset = true
+  form.value.rfFreqMhz = String(p.freqMhz)
+  form.value.rfBwKhz = String(p.bwKhz)
+  form.value.rfSf = String(p.sf)
+  form.value.rfCr = String(p.cr)
+  applyingPreset = false
+}
+watch(
+  () => [form.value.rfFreqMhz, form.value.rfBwKhz, form.value.rfSf, form.value.rfCr],
+  () => {
+    if (!applyingPreset && rfPreset.value && rfPreset.value !== 'custom') rfPreset.value = 'custom'
+  },
+)
+
 const selectedRegion = computed(() => regionByCode(form.value.region))
 const deviceType = computed(() => mesh.status?.device_type ?? 'unknown')
 // Firmware whose options apply: explicit pin wins, else the connected type.
@@ -78,14 +112,31 @@ async function saveSettings() {
   saveError.value = null
   saveDone.value = false
   try {
-    // MeshCore RF params: send only when all four are filled (partial input
-    // is a user error surfaced by the API's range validation; all-empty
-    // means "leave the radio's flashed settings alone").
-    const rf = [form.value.rfFreqMhz, form.value.rfBwKhz, form.value.rfSf, form.value.rfCr]
-    const rfAll = rf.every((v) => String(v).trim() !== '')
-    const rfAny = rf.some((v) => String(v).trim() !== '')
-    if (rfAny && !rfAll) {
-      throw new Error('Fill in all four RF fields (frequency, bandwidth, SF, CR) or leave all empty')
+    // MeshCore RF params: a named preset sends its plan; Custom sends the
+    // four fields (all required — partial input is an error); "Keep the
+    // radio's current settings" omits the key so the config is untouched.
+    let rfParams: { freq_khz: number; bw_hz: number; sf: number; cr: number } | undefined
+    if (rfPreset.value && rfPreset.value !== 'custom') {
+      const p = MESHCORE_RF_PRESETS.find((x) => x.id === rfPreset.value)
+      if (p) {
+        rfParams = {
+          freq_khz: Math.round(p.freqMhz * 1000),
+          bw_hz: Math.round(p.bwKhz * 1000),
+          sf: p.sf,
+          cr: p.cr,
+        }
+      }
+    } else if (rfPreset.value === 'custom') {
+      const rf = [form.value.rfFreqMhz, form.value.rfBwKhz, form.value.rfSf, form.value.rfCr]
+      if (!rf.every((v) => String(v).trim() !== '')) {
+        throw new Error('Fill in all four RF fields (frequency, bandwidth, SF, CR)')
+      }
+      rfParams = {
+        freq_khz: Math.round(parseFloat(form.value.rfFreqMhz) * 1000),
+        bw_hz: Math.round(parseFloat(form.value.rfBwKhz) * 1000),
+        sf: parseInt(form.value.rfSf, 10),
+        cr: parseInt(form.value.rfCr, 10),
+      }
     }
     await mesh.configure({
       lora_region: form.value.region,
@@ -93,16 +144,7 @@ async function saveSettings() {
       channel_name: form.value.channel.trim() || 'archipelago',
       ...(form.value.name.trim() ? { advert_name: form.value.name.trim() } : {}),
       broadcast_identity: form.value.broadcastIdentity,
-      ...(rfAll
-        ? {
-            lora_radio_params: {
-              freq_khz: Math.round(parseFloat(form.value.rfFreqMhz) * 1000),
-              bw_hz: Math.round(parseFloat(form.value.rfBwKhz) * 1000),
-              sf: parseInt(form.value.rfSf, 10),
-              cr: parseInt(form.value.rfCr, 10),
-            },
-          }
-        : {}),
+      ...(rfParams ? { lora_radio_params: rfParams } : {}),
     })
     saveDone.value = true
     setTimeout(() => { saveDone.value = false }, 3000)
@@ -187,7 +229,15 @@ async function saveSettings() {
            flashed settings untouched. -->
       <div v-if="effectiveKind === 'meshcore'" class="mt-4">
         <h5 class="text-xs font-semibold text-white/80 mb-2">MeshCore RF parameters</h5>
-        <div class="grid gap-3 grid-cols-2 sm:grid-cols-4">
+        <div class="mb-3">
+          <label class="block text-xs text-white/60 mb-1">Frequency plan</label>
+          <select :value="rfPreset" class="w-full rounded-lg bg-white/[0.06] border border-white/10 text-white px-3 py-2 text-sm focus:outline-none focus:border-orange-400/60" @change="selectRfPreset(($event.target as HTMLSelectElement).value)">
+            <option value="">Keep the radio's current settings</option>
+            <option v-for="p in MESHCORE_RF_PRESETS" :key="p.id" :value="p.id">{{ p.label }}</option>
+            <option value="custom">Custom…</option>
+          </select>
+        </div>
+        <div v-if="rfPreset === 'custom'" class="grid gap-3 grid-cols-2 sm:grid-cols-4">
           <div>
             <label class="block text-xs text-white/60 mb-1">Frequency (MHz)</label>
             <input v-model="form.rfFreqMhz" inputmode="decimal" placeholder="869.618" class="w-full rounded-lg bg-white/[0.06] border border-white/10 text-white px-3 py-2 text-sm focus:outline-none focus:border-orange-400/60" />