Winning bill of materials

Current winning setup

Role Item $/node Buy
WinnerHMCITY Shell
HMCITY ยท 120 LED solar wall light
$3.33 Buy 6-pack $19.98
WinnerRAKwireless Board
Mini starter kit (RAK19003 + RAK4631)
$31.97 Buy $31.97
WinnerTenmory Antenna
Tenmory ยท 915 MHz bendable duck
$5.99 Buy 2-pack $11.99
WinnerE6000 Glue
E6000+ adhesive
$0.40 Buy $8.29
WinnerFainWan JST PH
2-pin pigtails
$0.17 Buy 100-pack $16.99
WinnerMAIYUM Solder
Sn63/Pb37 rosin core
$0.15 Buy $8.99
Total $42.01 $98.21

Shells

Solar lights we ranked. See the winning setup above for our current pick.

Review Shell Works? mAh Buy
HMCITY โ–ถ
HMCITY
wall wedge
likely 1,200 Buy 6-pack $19.98
SOLPEX โ–ถ
SOLPEX
fence wedge
unknown โ€” Buy 12-pack $29.99
AUDERWIN โ–ถ
AUDERWIN
fence step
unknown โ€” Buy 12-pack $32.99
TECKNET โ–ถ
TECKNET
fence cap
unknown โ€” Buy 12-pack $32.99
NIORSUN โ–ถ
NIORSUN
fence wedge
unknown 500 Buy 12-pack $45.99
CLAONER โ–ถ
CLAONER
PIR wall
unknown 1,200 Buy 6-pack $24.99
ROSHWEY โ–ถ
ROSHWEY
fence wedge
unknown โ€” Buy 6-pack $27.99
Toeuitie โ–ถ
Toeuitie
fence wedge
unknown โ€” Buy 12-pack $59.96
FLITI โ–ถ
FLITI
fence wedge
unknown โ€” Buy 12-pack $59.99
JOFIOS โ–ถ
JOFIOS
fence step
unknown 1,200 Buy 12-pack $59.99
WENATY โ–ถ
WENATY
spotlight
unknown 1,500 Buy 12-pack $64.99
NACINIC โ–ถ
NACINIC
spotlight
unknown โ€” Buy 8-pack $49.99
LECLESTAR โ–ถ
LECLESTAR
flood
unknown 4,000 Buy 2-pack $31.98
VOLISUN โ–ถ
VOLISUN
spotlight
pass โ€” Not available
VOLISUN โ–ถ
VOLISUN
spotlight
pass โ€” Not available
NACINIC โ–ถ
NACINIC
spotlight
pass โ€” Not available

Boards

Swap the winning board if you want a different WisBlock base or a tighter fit.

Board Notes Buy
RAKwireless
Mini starter kit (RAK19003 + RAK4631)
RAKwireless
30ร—35 mm mini base. Best fit for tight shells. Kit antenna is bench-only; deploy with a field whip below. Buy $31.97
RAKwireless
WisBlock starter kit (RAK19007 + RAK4631)
RAKwireless
30ร—60 mm base with IO slot. Official 1.0 pick for SD storage and extra WisBlock modules. Buy $34.97

Antennas

Swap the winning whip if you want a different 915 MHz option. VSWR sweeps when we have them.

Antenna 915 MHz VSWR Notes Buy
Tenmory
915 MHz 3 dBi omni + U.FL pigtail (2ร—)
Tenmory
1.10 @ 916 Bendable rubber duck ~7.6 cm, SMA male. Pigtail in box. Current deploy pick. Buy 2-pack $11.99
muzi WORKS
915 MHz whip antenna, 17 cm
muzi WORKS
1.45 @ 915 Field deploy pick. E6000 on nut only; keep silicone off SMA mating surface. Buy 4-pack $39.90

Also buy

Glue, connectors, and bench tools. Budget consumables per node. Tools are buy-once.

Consumables

Per-node supplies for the build.

Item Notes Buy
HiLetgo
U.FL to SMA female pigtails, 15 cm optional
Optional spare. RAK4631 kit ships with a U.FL pigtail; Tenmory antenna box includes one too. Buy 5-pack $7.79
E6000
E6000+ adhesive 0.9 oz
IPEX dab + SMA nut seal. Not a structural glue for the whole enclosure. Buy $8.29
Letool
JST 1.25 mm 2-pin pigtails optional
Optional. JST 1.25 mm pigtails for solar or small-board jumpers (~80 mm leads). Buy 30-pack $6.99
FainWan
JST PH 2.0 mm 2-pin pigtails
RAK19003 battery JST-PH and similar (~120 mm leads). Buy 100-pack $16.99
Outus
No-clean rosin flux pens (3ร—) optional
Optional. Rosin flux pen for stubborn joints. Pairs with solder wire below. Buy 3-pack $9.99
MAIYUM
Sn63/Pb37 rosin-core solder 0.8 mm
50 g spool. Leaded 63/37. Wash hands after use. Buy $8.99

Tools

Soldering, measure, fabrication, hand tools.

Tool Notes Buy
ANBES
90W digital soldering iron kit (10-in-1)
Corded 90W, ceramic heater, LCD temp, auto sleep. Tips, stand, starter solder tube included. Buy $14.95
Kaisi
S-160 silicone soldering mat
Heat-safe bench surface; magnetic trays for screws. Buy $12.99
AstroAI
AM33B digital multimeter
Solar keep-up DMM checks (I_load, I_net). No AC current mode. Buy $14.59
AURSINC
NanoVNA-H antenna analyzer optional
Optional. Tune 915 MHz whips; overkill for a first node. Buy $52.99
AVID POWER
20V cordless drill kit, 3/8 in.
SMA bulkhead holes and shell mods. 10 drill + 10 driver bits. Buy $39.99
COMOWARE
Ti-coated step drill set (5 pc)
Step bits + center punch for sized enclosure holes. Buy $24.99
SEESII
Handheld battery spot welder optional
Optional. Custom 18650 packs only; janknodes use single cells + BMS. Buy $34.99
KAIWEETS
KWS-103 wire stripper
Self-adjusting 10โ€“24 AWG strip/cut/crimp. Buy $13.99
WORKPRO
6-piece pliers and wrench set
Long-nose + diagonal cutters cover most bench work. Buy $22.79