Best Eld For Semi Trucks: Compare Ports and App Setups

#1 · Best Overall

1. Garmin eLog

Best for: Subscription-Free Mixed-Port Fleets.

Why it ranks #1: Supports common 9-pin J1939 and 6-pin J1708 ports, records HOS, and has no subscription fees; verify its stated OBD-II and Volvo cable limitations.

Support for both 9-pin J1939 and 6-pin J1708 diagnostic ports is the Garmin eLog’s key practical advantage, letting many semi-truck drivers connect without sourcing a separate adapter. It automatically records Hours of Service, while stored records remain accessible on a compatible smartphone for inspection.

The stand-alone device supports J1939 and J1708 ports, covering two common diagnostic connections without a subscription-based service. Its HOS recording is intended to meet the FMCSA ELD mandate, and records stored on a compatible smartphone can be accessed for inspection through the device’s USB port or FMCSA Web Services. Check the truck’s protocol before choosing it: the Garmin does not support OBD-II vehicles, and Volvo engines with 16-pin J1962 require a separate cable that is not included.

Skip it if you have an OBD-II truck; the Garmin eLog does not support that protocol, so consider the PT30 with OBD-II cable for a compatible 16-pin application.

Choose the Garmin eLog if your truck uses J1939 or J1708 and you want HOS records accessible from a compatible phone without subscription fees. It is not a fit for OBD-II vehicles, and some Volvo 16-pin installations need a separate cable.

Listed on Amazon as: Garmin eLog, Compliant Electronic Logging Device (ELD), No-Subscription Fees, FMCSA Compliant, Supports 9-pin J1939 and 6-pin J1708 Diagnostic Ports (010-01876-00)

#2 · Broad Port Support

2. TEMEDA PT30

Best for: Multi-Protocol App Pairing.

Why it ranks #2: The included green 9-pin cable and stated J1939, J1708/J1587, and OBD-II connections offer flexibility across compatible truck configurations.

Support for J1939, J1708/J1587, and OBD-II connections makes this TEMEDA PT30 bundle unusually flexible across diagnostic-port types. Bluetooth Low Energy links the device with a compatible phone or tablet, while its large-capacity storage supports offline operations when a cellular connection is unavailable.

The PT30 reads engine diagnostics directly from the vehicle, and its multi-protocol connections cover J1939, J1708/J1587, and OBD-II applications. Bluetooth Low Energy pairs it with compatible ELD/HOS apps on a phone or tablet, giving drivers a mobile workflow rather than a dedicated screen. Large-capacity storage is specified for offline operations, while the integrated antenna and diagnostics are included in the device. It can be plugged or unplugged as needed for DOT compliance use.

Skip it if you need a named, confirmed app pairing; the TEMEDA listing says compatible apps, while Garmin eLog stores records on a compatible smartphone and offers inspection access.

This TEMEDA PT30 suits drivers needing multiple diagnostic-port options, mobile app pairing, and offline storage. Choose it only when your preferred ELD/HOS app is compatible; the listing does not provide a named app list to guide that decision.

Listed on Amazon as: TEMEDA- PT 30 ELD – Electronic Logging Device + Cable – HOS & FMCSA Compliant – Easy to Install – New (PT30+Green 9 Pin Round Cable)

#3 · Built-In 9-Pin

3. IOSiX Micro ELD

Best for: Integrated Green 9-Pin Install.

Why it ranks #3: Its built-in 9-pin green connector needs no cable, and Bluetooth 4.2 plus a multi-constellation GNSS receiver are listed features.

A built-in 9-pin green connector removes the need for a separate cable in the listed configuration, making this IOSiX Micro ELD a direct-install option for compatible trucks. Bluetooth 4.2, WiFi, and multi-constellation GNSS add wireless communication and location hardware to the compact unit.

The IO-1020 combines a built-in green 9-pin connector with Bluetooth 4.2 and WiFi, supporting wireless communication without a separately listed cable. Its multi-constellation GNSS receiver has a built-in high-gain antenna, providing integrated positioning hardware. Full-color RGB LEDs indicate status, which gives the unit a visible local signal. IOSiX also specifies over-, under-, and reverse-voltage protection and ESD protection, relevant to electrical exposure in vehicle installations; its listed connectivity does not establish app compatibility.

Skip it if you need a specifically named app before choosing hardware; the IOSiX listing does not identify compatible apps, while the Konexial My20 lists Apple and Android devices.

Choose the IOSiX Micro ELD if your truck uses its built-in green 9-pin connection and you value integrated wireless and GNSS hardware. Confirm that your intended HOS app supports it, since the supplied listing does not name compatible apps.

Listed on Amazon as: IOSix HOS Logbook Device for HOS App for ELD (DOT+FMCSA Certified) Built-in 9-Pin Green Connector (No Cable Needed)

#4 · GPS Tracking

4. Konexial My20 ELD

Best for: Phone-Based Fleet Telematics.

Why it ranks #4: The 9-pin J1939 unit connects to a phone or tablet by Bluetooth and lists GPS tracking and log auditing; service requires a subscription.

Konexial’s My20 combines Bluetooth-linked ELD use with GPS tracking and fleet data tools, making it a fit for operators who want more than HOS logging. Its app works with iPhone, iPad, Android phones, and Android tablets, and the standard connector is 9-pin J1939.

Installation starts by plugging the My20 into the diagnostic port, downloading the app, and linking a phone through Bluetooth. The standard 9-pin J1939 connector suits trucks with that ECM port; adapters for OBD-II or 6-pin ECM ports are available for purchase. Beyond ELD use, listed tools include GPS tracking, log auditing, DVIR, digital documentation, fuel information, messaging, reports, and maps, supporting fleet oversight through the app. Continued service requires an active subscription.

Skip it if you want a no-subscription ELD; the Garmin eLog has no subscription fees, whereas My20 requires a current subscription for service.

Pick the My20 if you want app-linked HOS plus tracking and fleet documentation tools across supported Apple or Android devices. The standard connector is 9-pin J1939; OBD-II and 6-pin ECM installations need separately purchased adapters.

Listed on Amazon as: My20 ELD (Electronic Logging Device), Truck GPS Tracking, FMCSA Compliant, 9-pin J1939, 6-pin J1708, OBD-II Diagnostic Ports, Subscription Required

#5 · 16-Pin Bundle

5. PT30 16-Pin Bundle

Best for: Heavy-Duty 16-Pin Cable Bundle.

Why it ranks #5: Includes a heavy-duty 16-pin cable and is described for compatible Volvo and Mack trucks; confirm the truck has the required connector.

A heavy-duty 16-pin diagnostic cable comes with this PT30 ELD package, making it the targeted choice for compatible Volvo and Mack trucks. The device connects through the vehicle’s diagnostic port to support electronic logging and vehicle-data communication, with installation described as a direct cable connection.

The included heavy-duty 16-pin cable connects the PT30 to a compatible diagnostic port, avoiding the need to source that cable separately. The listing specifically identifies compatible Volvo and Mack applications, while warning that connector configurations vary by truck model and year. Once connected, the PT30 supports electronic logging and vehicle-data communication. This bundle suits a 16-pin setup, but buyers should verify the actual connector configuration before ordering rather than assuming every Volvo or Mack truck uses the same port.

Skip it if you need a light-duty OBD-II square cable; this bundle is for 16-pin applications, while the PT30 bundle with black square cable targets light-duty OBD-II.

Choose this PT30 package when a compatible Volvo or Mack truck has the required heavy-duty 16-pin diagnostic connection. Connector configurations vary, so its vehicle examples do not replace checking the actual port on your truck.

Listed on Amazon as: PT 30 ELD Device with OBD-II Cable (16pin Heavy Duty Cable), Electronic Logbook, HOS, GPS Fleet Tracking, Commercial Truck ELD, DOT

#6

6. PT30 Volvo Cable Bundle

Best for: Volvo-Targeted Cable Bundle.

Why it ranks #6: The included orange-and-gray cable is designated for Volvo trucks, and the device communicates with compatible HOS apps by Bluetooth.

The orange-and-gray cable identified for Volvo trucks is the defining detail of this PT30 bundle, giving it a vehicle-specific connection focus. The PT30 reads engine diagnostics and communicates over Bluetooth with compatible phones or tablets, supporting an app-based ELD/HOS workflow when the cable and software match.

This package includes one PT30 and an orange-and-gray cable labeled for Volvo trucks. The PT30 reads engine diagnostics, while Bluetooth connects it with compatible ELD/HOS apps on a phone or tablet. That setup can keep logging within a mobile workflow, and the device can be plugged or unplugged as needed for DOT compliance use. The listing does not state the cable’s pin configuration or name supported apps, so verify both details against the truck and software before relying on this bundle.

Skip it if you need a clearly specified heavy-duty 16-pin cable; the PT30 16-pin bundle identifies that connector type, while this Volvo cable listing does not.

Consider this PT30 bundle for a Volvo-truck application where its orange-and-gray cable matches the vehicle and compatible software. The listing does not specify pin configuration or app names, so those details are important fit boundaries.

Listed on Amazon as: PT30+Cable Bundle-ELD Geosavi Buy America (PT30+Orange & Gray Cable ForVolvoTrucks)

#7

7. PT30 9-Pin Device

Best for: Simple 9-Pin Fleet Connection.

Why it ranks #7: This PT30 includes a 9-pin cable and Bluetooth connectivity for compatible ELD applications, but its listed details provide fewer port specifics.

A supplied 9-pin cable gives the PT30 a direct connection point for compatible trucks and commercial vehicles, while Bluetooth links it to compatible mobile devices and ELD applications. That combination suits operators seeking a basic engine-data connection without a more elaborate installation description.

The PT30 connects to a vehicle to provide engine and vehicle data to compatible ELD software, so its role depends on pairing it with supported software rather than using it as a standalone logging screen. Bluetooth communication supports a connection to compatible mobile devices and ELD applications. Installation is described as straightforward for compatible commercial vehicles; the included PT30 device and cable are specified as 9-pin, so confirm the truck’s diagnostic connection before selecting this bundle.

Skip it if you need a named app-compatibility list before buying; the PT30 listing only specifies compatible ELD software, while the Konexial My20 names iPhone, iPad, and Android devices.

Consider this PT30 bundle if your commercial vehicle uses the included 9-pin cable and your ELD application supports the device over Bluetooth. Its listing leaves specific app compatibility to the buyer, so it is less suitable when named software support is essential.

Listed on Amazon as: PT30 ELD Device with 9 PIN Cable for Trucks and Commercial Vehicles

#8

8. TFM ELD

Best for: Basic FMCSA-Claimed ELD.

Why it ranks #8: It is identified as an ELD for trucks and lists a one-year manufacturer warranty, but the supplied details do not specify its connector or app setup.

The TFM ELD listing explicitly identifies the device as an FMCSA-compliant electronic logging device for trucks, giving compliance-focused buyers a clear starting point. Beyond that core description, the supplied information identifies the manufacturer but does not detail a connector, app, or vehicle-data workflow.

This product is presented as an electronic logging device for trucks and states FMCSA compliance in its title. The supplied specifications name TFM ELD as the brand and IOSIX as the manufacturer, but provide no connector type, supported app, or installation steps. That limited information makes it difficult to match the device to a semi-truck’s diagnostic port or established logging workflow. Buyers should treat the compliance claim as the only stated functional detail when comparing it with more fully specified devices.

Skip it if you need a documented port or app match; Garmin eLog specifies J1939 and J1708 support, unlike the details supplied for this TFM ELD.

This TFM ELD may suit buyers prioritizing a straightforward FMCSA-compliance claim, but the supplied listing does not establish connector or app compatibility. For semi-trucks, choose it only when those missing workflow details are confirmed for your setup.

Listed on Amazon as: Electronic Logging Device (ELD) for Trucks, FMCSA Compliant

#9

9. PT30 Light-Duty OBDII Bundle

Best for: Light-Duty OBD-II Bundle.

Why it ranks #9: It includes a black square light-duty OBDII cable, making the listed configuration a less direct match for a semi-truck than heavy-duty port options.

The included black square light-duty OBD-II cable is the defining feature of this PT30 bundle, targeting compatible vehicles with that diagnostic connection. The device reads engine diagnostics and communicates by Bluetooth with phones or tablets running compatible ELD/HOS apps, keeping the workflow app-based.

This bundle pairs a PT30 with a light-duty OBD-II square cable, so its connection type is central to choosing it. The PT30 reads engine diagnostics and sends information through Bluetooth to a compatible phone or tablet app. Its ability to plug in or unplug as needed supports use in a DOT compliance workflow, while customizable behavior can match customer requirements. The listing does not provide specific app names, so confirm software support as well as the vehicle’s port configuration before installation.

Skip it if you have a compatible heavy-duty 16-pin application; the PT30 with OBD-II cable listing is aimed at that port type, unlike this light-duty square-cable bundle.

This PT30 bundle fits buyers with a compatible light-duty OBD-II square port who want Bluetooth app communication and engine diagnostics. Its cable is specifically listed as light-duty, so it is not the heavy-duty 16-pin option.

Listed on Amazon as: PT30+Cable Bundle-TT ELD -Bluestar ELD – ELD365 -ELD24/7 Geosavi Buy America (PT30+Black Square Light Duty OBDII Cable)

#10

10. PT30 Square OBDII Bundle

Best for: Light-Duty Square-Cable App Use.

Why it ranks #10: Its square cable is specified as light-duty OBDII, so the supplied configuration is a poor fit for a semi truck unless compatibility is confirmed.

The light-duty OBD-II square cable distinguishes this PT30 bundle for compatible vehicles with that port configuration. Its PT30 reads engine diagnostics and uses Bluetooth to communicate with phones or tablets running compatible ELD/HOS apps, enabling a mobile logging workflow rather than a listed standalone display.

The included PT30 and light-duty square cable establish the physical connection, while Bluetooth supports communication with compatible phone or tablet apps. The device reads engine diagnostics, giving compatible ELD/HOS software vehicle data to work with. The listing also says it can be plugged in or unplugged as needed for DOT compliance and offers customizable behavior. Since no particular application is named, software compatibility remains an important part of deciding whether this bundle fits an existing driver workflow.

Skip it if you need a heavy-duty 16-pin cable for a Volvo or Mack; the PT30 16-pin cable bundle is specified for those compatible applications.

This PT30 bundle suits buyers whose vehicle uses the listed light-duty OBD-II square connection and who plan to use a compatible Bluetooth ELD/HOS app. It is not the heavy-duty 16-pin cable package for compatible Volvo or Mack trucks.

Listed on Amazon as: PT30+Cable Bundle-ELD Geosavi Buy America (PT30+Light Duty OBDII Square Cable)