1. Parts and Accessories
A complete reference for every piece of hardware that can go with an ISURLOG β the unit itself, mounting/enclosure, antennas, batteries, external/solar power, and connectivity. For each item: what you can get directly from Isurki, and what you can source yourself if you'd rather buy or already have it.
Want to build a custom order instead of reading through tables? See 2. Build Your Own ISURLOG for an interactive configurator that adds up the total as you go.
All "From Isurki" prices are in EUR and exclude VAT.
Work in progress
π§ Several rows below are placeholders β real prices, models, and supplier links need to be filled in. Nothing here is fabricated; where we don't have a confirmed figure yet, it's marked explicitly rather than guessed.
1.1 The Datalogger
| Item | From Isurki | Bring your own |
|---|---|---|
| ISURLOG β NB-IoT/LTE-M variant | β¬387 | No alternative β this is the core hardware |
| ISURLOG β LoRaWAN variant | β¬330 | No alternative β this is the core hardware |
| ISURLOG β Wi-Fi only | β¬310 | No alternative β this is the core hardware |
Protective Coating Options
| Item | From Isurki | Bring your own |
|---|---|---|
| Standard conformal coating (50β200 Β΅m) | Included on every board, standard | Not applicable β factory process |
| Extra conformal coating layer | +β¬15 | Apply your own β e.g. Multicomp Pro MP014781, silicone conformal coating, 55 ml |
| Resin potting β the board is cast in transparent resin, leaving only the sensor and power connectors exposed | +β¬80 | Apply your own β needs 2 packs of Electrolube UR5634RP250G, clear polyurethane resin, 250 g. Only compatible with Li-SOCl2 batteries. |
For more details on resin potting, contact Isurki.
1.2 Enclosure & Mounting
| Item | From Isurki | Bring your own |
|---|---|---|
| 3D-printed enclosure (PETG, IP66) | β¬35 | π¬ In discussion |
| DIN rail mount β direct, or via a separate 3D-printed piece fixed to the wall | β¬28 | π¬ In discussion |
| Pole mount | β¬18 | π¬ In discussion |
| ER34615 battery holder/adapter β small PCB that takes power from up to 2 ER34615 cells and combines it into a single output feeding the ISURLOG. Required to use Li-SOCl2 batteries. | β¬20 | π¬ In discussion |
π¬ A self-sourced/DIY path for these parts (enclosure, mounting) isn't available yet β direction still in discussion. Let us know if you'd find this useful.
See 4.2 Physical Mounting for the standard mounting-hole dimensions if you're designing your own bracket instead.
1.3 Antennas
| Item | From Isurki | Bring your own |
|---|---|---|
| NB-IoT / LTE-M antenna (shares GPS reception, no separate GPS antenna needed) | Included with the NB-IoT/LTE-M unit | Molex 209142-0180 β ~β¬3.78, or any other NB-IoT-compatible antenna with 50 Ξ© impedance |
| LoRaWAN antenna (868 MHz) | Included with the LoRaWAN unit | TE Connectivity 2195835-3 β must be 868 MHz, 50 Ξ©, low VSWR. Not the same antenna as NB-IoT β different frequency band. |
Both use a U.FL connector on the PCB. Wi-Fi and Bluetooth don't need an external antenna β they use the one integrated directly on the PCB. See 3. Communications for the full connection requirements.
External-Mount Antennas (Higher Gain / Remote Mounting)
If a higher-gain external antenna is needed, the antennas above β which mount directly on the PCB's U.FL connector β aren't the right fit. A pigtail brings the connection out to an external, cable-mounted antenna instead.
| Item | From Isurki | Bring your own |
|---|---|---|
| U.FL to SMA-female pigtail cable β brings the U.FL connection out to a panel/bulkhead-mountable SMA-female connector. Fits both the NB-IoT/LTE-M and LoRaWAN modules' onboard U.FL connector. | β¬12 | RS Online β U.FL to SMA-female coaxial cable, or any other U.FL to SMA-female pigtail with 50 Ξ© impedance |
| External NB-IoT/LTE-M antenna (SMA male) | β¬6 | SR Passives GSM-ANT-SV03, or any other NB-IoT-compatible SMA antenna with 50 Ξ© impedance |
| External LoRaWAN antenna (SMA male, 868 MHz) | β¬10 | RS Online β 868 MHz telemetry antenna, or any other 868 MHz SMA antenna with 50 Ξ© impedance |
Breaks the IP66 Seal
Mounting the antenna outside the 3D-printed enclosure means drilling a hole through it for the pigtail β this breaks its IP66 rating unless the passthrough is properly sealed (e.g. with a cable gland or a panel-mount SMA bulkhead connector and gasket).
1.4 Batteries
| Item | From Isurki | Bring your own |
|---|---|---|
| 18650 (Li-Ion, rechargeable) β 1 to 5 cells, up to 17000 mAh total | β¬30 (set of 5, rechargeable) | Samsung INR18650-35E, 3400mAh / 8A or equivalent β ~β¬2.59/unit. Must be 18650 format, Li-Ion, rechargeable. |
| Li-SOCl2 (non-rechargeable) β requires ISURLOG v3.3+ and the ER34615 battery holder/adapter above | β¬40 (set of 2) | Any ER34615 format, Li-SOCl2 battery. Recommended: EVE ER34615EHR2 |
| CR2032 (coin cell) β RTC backup only, not main power | Included on the standard PCB | For replacements/spares: EEMB CR2032, 3V, with cable and Molex 51021-02 connector (2mm pitch) β not just any CR2032, the connector must match. See 2.3 RTC Backup Battery for the connector pinout. |
See 2. Power Supply Methods for jumper configuration and battery-holder details.
1.5 External / Solar Power (Hybrid Mode)
For deployments combining batteries with an external charging source. The MPPC input accepts one of three voltage ranges β see 2.2 Jumper Configuration for the required jumper settings.
| Item | From Isurki | Bring your own |
|---|---|---|
| 5V solar panel | β¬34 | Example panel β see warning below before choosing your own |
| 1.5V β micro solar panel | β | π§ No specific recommended model yet |
| 0.3V β TEG (Thermoelectric Generator) | β | π§ No specific recommended model yet |
Regulated 5V Required
Many panels labeled "5V" actually reach up to 7V in open-circuit conditions (i.e. with nothing connected, or under low load), which can damage the ISURLOG's input. Only use a panel with an internal regulator that keeps its output stable and never exceeds 5.5V, even unloaded.
1.6 External Power (Mains)
For deployments powered from mains/external power rather than batteries alone β see 2.1.2 External Power Only. Power comes in either via the USB-C port, or via the PIN pressure terminals. Batteries can still be installed alongside external power as a backup for outages β see 2.1.3 Batteries + External Power (Hybrid Mode).
| Item | From Isurki | Bring your own |
|---|---|---|
| 5V/1A wall power adapter | β¬20 | Example adapter |
| USB-A to Micro-USB cable β only needed to power via the PIN terminals instead of USB-C | β¬10 | Amazon Basics USB-A 2.0 to Micro-USB, 3 m β see note below |
This cable gets wired into the PIN terminals, not used as a USB cable
Cut the Micro-USB end open and identify the two power wires inside β the data wires aren't needed. Connect the positive and negative power wires directly to the ISURLOG's PIN 5V MAX pressure terminals.
1.7 Connectivity
| Item | From Isurki | Bring your own |
|---|---|---|
| Integrated eSIM + data plan (NB-IoT/LTE-M) β 500 MB or 5 years, whichever comes first. A typical ISURLOG uses ~1.5β2 MB/month, well within the plan. Data usage can be tracked per device in IsurDASH, under Data Visualization, Location and SIM Data. | β¬36 | Not applicable, it's built in |
| External Nano-SIM (NB-IoT/LTE-M) | β | Any NB-IoT/LTE-M-compatible operator SIM |
| NTN SIM (satellite, via nRF9151) | β | Monogoto β check NTN satellite coverage for your region |
See 3.2 SIM Management Flexibility for how the eSIM/Nano-SIM switch works.
1.8 Firmware
| Item | From Isurki | Bring your own |
|---|---|---|
| Standard firmware β pre-flashed, integrates with IsurDASH out of the box | β¬0 (included) | See GitHub Releases for released firmware versions |
| Flash your own firmware β the firmware is open source (GitHub), compile and flash a custom build instead | β¬0 | See 1. Build Environment Setup and 3. Flashing and Application Upload |
1.9 Developer Tools (one-time, reusable across units β not per-deployment)
| Item | Needed for |
|---|---|
| UART-to-USB TTL cable | Flashing the ESP32 side β see 3. Flashing and Application Upload. |
| nRF9160-DK + 6-pin TAG-Connect cable + nRF Connect for Desktop | Updating the nRF9151 modem firmware β see 5.6 Flashing Hardware Requirements. |
Missing something you'd expect to see here, or have a supplier recommendation for one of the π§ rows? Open a GitHub Issue β see 7.4 Using the Issues Tracker.