> For the complete documentation index, see [llms.txt](https://ask.simplehw.eu/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ask.simplehw.eu/kb/simple-api-6-generation/overview/device-list/simplepack/legacy/simplepack-api-2-4-5-and-6-comparison.md).

# SimplePack API 2, 4, 5 and 6 comparison

| Device                    | Status/availability                                                                                                                            |
| ------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
| SimplePack 1.0            | Produced (expo version), sold out                                                                                                              |
| SimplePack 1.1            | Produced (commercial and expo), sold out                                                                                                       |
| SimplePack 1.2            | Produced, clicking button with click feedback, sold out                                                                                        |
| SimplePack 2.0            | Produced, clicking button and LED offset from button with higher luminosity, upgraded API, sold out                                            |
| SimplePack 3.0/4.0 (Plus) | Produced, main SimpleHw product, check the SimplePack 3.0/4.0 category, [in stock, check the eshop for availability](https://simplehw.eu/shop) |

## API 6

* one API for all new Simple Hardware devices (SimpleLeak, SimplePack Plus, SimpleIndustry, SimpleMeter)
* easy to read, comprehend and parse in any IoT platform
* support of stateless payload parsing
* future proof and ready with full forward and backward compatibility both in downlink and uplink
* new uplink and downlink mechanism
* using simpleTime for all time definitions (from 1 second to 63 days) using just one byte
* using simpleTemp for all temperature definitions (from -40°C to 87,5°C with 0,5°C resolution)
* support for all new sensors
* 2 definable heartbeats with definable behaviour and additional payloads
* message and heartbeat appendable information at defined fixed payload positions
* support for Sigfox coverage confirmation
* ready for logical operators via downlink on device side
* ready for world time sync and world time timed alerts
* totally configurable alerts (repetitions, actions, behaviour)
* easy to understand and consistent LED blinking and beeping
* global switch for muting and no LED indication
* support for sending only 1 frame instead of 3 frames (you can now send 20 messages per hour)
* myriads of other refinements and improvements

{% content-ref url="/pages/-M\_VmNQ3qg9rfcN3eBWq" %}
[Broken mention](broken://pages/-M_VmNQ3qg9rfcN3eBWq)
{% endcontent-ref %}

## API 5 (LEGACY)

* expands the modes to Don't drop me
* heartbeat contains always temperature and voltage during transmission
* temperature and voltage can be appended to all messages (exception is Monitor me)
* switchable appending accelerometer values to all messages
* very long press is detected at pressing for more than 6 seconds (prev. 10 secs)
* switchable automatic arming after selectable inactivity period (exception is Monitor me, Trace me)
* switchable sending of confirmation message on moment of arming (after departure delay)
* switchable automatic disarm after alert
* switchable disarm by long press
* adjustable sampling interval in Monitor me mode (prev. 1 sec)
* switchable button  clickable and alerting even while other modes are running
* switchable no downlink requested after alarm
* non-linear timers for Arrival delay, Sleep time, Automatic arm time

[**API 5 documentation**](https://docs.google.com/spreadsheets/d/1616krkTZz6iCMI5YTxwOo10u3eYOwVr7-IzNzN86Kkw/edit?ts=5b7152b7#gid=26269534)

## API 4 (LEGACY)

* expands the modes to Put me back and Monitor me
* expands the payload definition
* enables doubleclick, long press and extra long press (downlink request)
* more configurability of heartbeat interval
* arming can be done through downlink
* heartbeat can request downlink and can arm/disarm
* LED can be switched off
* API 4 LED behavior:
  * LED light is slowly blinking to confirm successful downlink.
  * LED light is slowly blinking to confirm manual downlink request (button press for more than 10 seconds).

[**API 4 documentation** ](https://docs.google.com/spreadsheets/d/1LT7uJGlqZxL701OgG_R6aRtSGwrHQ8Kn7zzQ_C9ZaNE/edit?usp=sharing)

## API 2 (LEGACY)

**Modes:** Press me, Guard me, Track me, Trace mode

[**API 2 documentation**](https://docs.google.com/document/d/1TZDtiJn8p_V2a2Y0E_sH9Do4r1sdTVNP5VHKIhdSqLI/)