MeshCore, not Meshtastic. This node runs MeshCore firmware. Meshtastic and MeshCore are different
protocols and do not talk to each other — every board below ships with Meshtastic and gets reflashed to the MeshCore
repeater build at flasher.meshcore.io. The URL says "meshtastic" because that's what people search for.The Site
Tower
55 ft HDX
already bonded to ground — only a #6 AWG tail needed
Companion in hand
SenseCAP T1000-E
MeshCore 1.17.1 BLE, flashed 09-04
Radio preset
910.525 MHz
USA/Canada · 62.5 kHz · SF7 · CR 8 on repeaters
Budget it must survive
9 days no sun
0.26 W load · Dec ≈ 3.0 peak-sun-h (assumed)
Pick Your Build
Running total — Rokland build
Prices verified on vendor pages 2026-09-08 unless tagged est. Tick a box to drop a line from the total.
| Item | Spec / why | Qty | Price | Buy | |
|---|---|---|---|---|---|
| RAK WisMesh Repeater + Solar + Battery verifiedRAK10721 · US915 | RAK4631 (nRF52840 + SX1262) in an IP67 box · 10 W panel · RAK9154 5.2 Ah / 56 Wh Li-ion · RP-SMA female port · 2.5 dBi whip incl.Ships Meshtastic → reflash MeshCore RAK_4631_repeater. No built-in GPS (spec sheet checked 09-08). |
1 | $309.97 | Rokland | |
| 5.8 dBi fiberglass omni, 915 MHz verifiedN-male · 32 in | 2 U-bolts + bracket included, no cable included. N-male mates straight into the arrestor — no adapter. | 1 | $42.97 | Rokland | |
| RAK12501 GNSS module HOLDQuectel L76K · antenna incl. | UART-only → needs WisBlock slot A; nothing published says whether the RAK10721 exposes it. Email Rokland first. Build runs fine on a hard-coded lat/lon without it. | 1 | $13.97 | Rokland | |
| PolyPhaser GT-NFF-AL surge arrestor verifiedN f/f bulkhead · DC–6 GHz · 20 kA | Gas discharge, IP67. Mounts at the antenna bracket so the whole RF chain is ~3 ft (≈0.4 dB) instead of 60 ft down the tower. | 1 | $76.99 | Mouser | |
| LMR-240 jumper, 3 ft estN-male → RP-SMA male | Arrestor → node. The node port is RP-SMA female, so the cable end is RP-SMA male. | 1 | ~$14 | Amazon | |
| Bonding tail est#6 AWG · lugs · stainless hardware | Arrestor + enclosure into the tower's existing bond. Not a ground-rod kit — the tower is already grounded. | 1 | ~$18 | Amazon | |
| Weatherproofing estbutyl mastic · UV vinyl tape · UV zip ties | 3M 2228 or Coax-Seal on every connector; connector corrosion is the #1 field failure. | 1 | ~$28 | Amazon |
Why this one: same radio as the DIY route, but the weatherproofing, charge circuit and battery are somebody else's engineering problem, it's in stock in the US (no tariff surprise), and it has a warranty. It costs ~3–4× the DIY box.
Running total — AliExpress DIY build
⚠ AliExpress prices move daily and vary by seller — these are ranges seen 2026-09-11, totalled at the midpoint. Click through and confirm before you buy. Since the US de-minimis exemption ended (Aug 2025), tariff is added at checkout — use the landed price AliExpress shows.
| Item | Spec / why | Qty | Price | Buy | |
|---|---|---|---|---|---|
| Radio: RAK WisBlock Meshtastic Starter Kit ~RAK4631 + RAK19007 base · US915 · RAK official store | Same nRF52840 + SX1262 radio as the $310 kit. Deep-sleep 3–5 µA; the base board has a battery JST and a 5 V solar input with its own charger, so no separate charge board.Alt, cheaper: XIAO nRF52840 + Wio-SX1262 kit (~$25–30) — also MeshCore-supported, but then you need the CN3791 charger line below. | 1 | $35–45 | AliExpressXIAO altsearch | |
| Waterproof box, IP67 ABS, clear lid ~≈200 × 150 × 100 mm · hinged · stainless latches | Clear lid lets you see the status LED from the ground with binoculars. Get one with an internal mounting plate. Three penetrations: N bulkhead, PG7 for the panel lead, optional vent. | 1 | $8–16 | AliExpresssearch | |
| Solar panel, 6 V 10 W mono ~ETFE/epoxy, waterproof, bare lead | 10 W × ~3 Dec sun-h × 0.6 = ~18 Wh/day vs 6.2 Wh load — same margin as the prebuilt kit. Mount 50–60° from horizontal, facing south. | 1 | $14–20 | AliExpresssearch | |
| Battery: 2 × 18650, 3400–3500 mAh + 2-slot holder ~wired in parallel → ~7 Ah / 25 Wh | 25 Wh ÷ 6.2 Wh/day = 4 days of zero sun (the RAK kit's 56 Wh gives 9). Go to 3 cells if you want parity.⚠ Buy the cells from a US vendor (18650BatteryStore / Liion Wholesale) — AliExpress 18650 capacity claims are routinely fake. Holder from AliExpress is fine. | 1 | $14–18 | Cells (US)holder | |
| CN3791 MPPT solar charger board, 6 V ~only for the XIAO route | Unticked by default — the RAK19007 base charges from its own solar header. Needed if you go XIAO (no charger on board). Add a 1 A polyfuse between battery and load either way. | 1 | $2–4 | AliExpresssearch | |
| 5.8–8 dBi fiberglass omni, 868/915 MHz ~N-female (or N-male — check the listing) | The single biggest range lever. AliExpress gain numbers are optimistic; treat "8 dBi" as ~5–6. Confirm the connector gender before ordering the jumper. | 1 | $15–25 | AliExpresssearch | |
| N f/f gas-tube lightning arrestor ~DC–3 GHz · 90 V GDT · bulkhead | Cheap-import arrestor: works, but the GDT quality is unknown and it's the part standing between a lightning strike and everything else. The PolyPhaser ($77, US) is the honest upgrade on a 55 ft tower. | 1 | $8–12 | AliExpresssearch | |
| u.FL → N-female bulkhead pigtail ~15–20 cm · 1.13/1.37 mm coax | RAK4631/XIAO LoRa port is u.FL (IPEX). The bulkhead goes through the box wall — that's your antenna port. Keep it short. | 1 | $3–5 | search | |
| LMR-240 jumper, N-male → N-male, 1 m ~ | Box bulkhead → arrestor → antenna. (If the antenna is N-female, you need one more N-male jumper or a N m/m barrel — check gender first.) | 1 | $7–11 | AliExpresssearch | |
| PG7 cable glands, 10-pack ~nylon · IP68 | Panel lead entry, bottom of the box. Silicone around every gland. | 1 | $2–4 | search | |
| Mounting + weatherproofing ~U-bolts/hose clamps · butyl tape · UV zip ties · 1 A polyfuse · silicone | Stainless hardware. Butyl + UV tape on every RF joint. Conformal-coat the PCB if you're feeling thorough. | 1 | $12–18 | search | |
| Bonding tail est#6 AWG · lugs — buy local | Same as the Rokland build; hardware store, not a 3-week parcel. | 1 | ~$18 | Amazon |
All-in-one shortcut worth a look: AliExpress also lists a
Heltec solar-repeater enclosure kit (IP67 box + panel + battery bay, "Meshtastic/MeshCore", fits Heltec V3/V4/T114).
Only the T114 variant is nRF52 — the V3/V4 are ESP32 and idle at 10× the current; don't put those on solar on a tower.
What you give up vs the prebuilt kit: ~half the battery autonomy unless you add cells, an unrated charge circuit (RAK19007's is fine; TP4056 boards are not), your own IP67 workmanship, and a 2–4 week wait. What you gain: ~$350 and a box you can open.
Traps We Already Fell In
1 · "The RAK kit has GPS"
It doesn't. GPS is the separate RAK12501 (RAK replaced the RAK12500 in July 2025). It's UART-only and needs WisBlock slot A — unconfirmed on the RAK10721. Holding it blocks nothing.
2 · "3.7 V LiFePO₄ 12 Ah"
Not a real part — LiFePO₄ cells are 3.2 V. The kit's battery is a RAK9154 Li-ion, 5.2 Ah / 56 Wh. Enough for 9 days of dark.
3 · "Ships with MeshCore"
Everything ships Meshtastic. Flash RAK_4631_repeater, then change the admin password from password before it goes up — remote admin over the mesh is the only way in afterwards. No Bluetooth on repeater firmware.
4 · "RP-SMA → SMA adapter"
Wrong chain. The antenna is N-male, the arrestor is N-female both sides: antenna → arrestor → one jumper → node. Nothing to adapt.
5 · Preset first, then CR
Select the USA/Canada preset, then change only coding rate to 8. Any other edit flips the node to "Custom" and it silently stops hearing the local mesh.
6 · 50 W panel + 20 Ah
Someone scoped that. It's ~5× oversized for a 0.26 W load — $150–200 of parts that would never be used.
Build Order
- Order. Rokland: 6 of 7 lines, hold the GPS. AliExpress: everything above, cells from a US vendor.
- Flash MeshCore repeater firmware on the bench; set preset → CR 8, name, admin password, lat/lon. Bench-soak 24 h on the panel.
- DIY only: drill the box (N bulkhead, PG7 gland), mount plate, wire panel → base → battery, polyfuse, silicone every hole, 24 h cure.
- Confirm the T1000-E hears it from the house, then from the far pasture.
- Climb weekend (with the DisneyFarm AP): antenna at the top, arrestor at the bracket, node right below, bonding tail to the tower. Butyl every joint.
- Repeater admin over the mesh from the app — verify the password is no longer the default.
Source of truth for this page is the Obsidian vault (Reports/solar-mesh-repeater-tower.md); prices re-verified 2026-09-08 (Rokland) and ranged 2026-09-11 (AliExpress).