The H60 / H66 Wireless gateway from Husdata.se is an universal IoT platform compatible with most popular ground source , air/water and Exhaust air heat pumps manufactured by Bosch, IVT, Thermia and NIBE.
H66 is the replacement of H60 introduced as components in H60 had supply shortage. The new H66 has same features as H60 and the user manual is the same.

The gateway is bridging the heat pump controller with Wi-Fi networking supporting various interfacing protocols and methods. The device is fully supporting the Husdata Online system (optional use) giving quick and easy features such as monitoring and analysis, remote heat settings, and alarm with notifications via email and SMS. A low cost subscription is required for this service.Included with H60 is the Windows software StatLink giving flexible real-time overview and tools for historical reporting without any subscription.

For Home Automation, H60 features open communications over MQTT protocol, Modbus TCP, Webhooks and RestAPI targeting integrations with various smart home solutions such as the Home assistant, IFTTT, Domoticz or Athom Homey Pro.

The H60 has a built in Web interface with many features. Using the web interface you can manage and monitor the heat pump directly without any online or home automation system connected. The web interface also have functions for troubleshooting, request remote support and update the firmware of the unit. The web interface is of responsive design and is scaling for smart phones or full web usage.

Finally the unit has an USB serial interface for advanced users.

Hardware overview of the H60/H66 device.

The H66 solution is sold as a main unit that including a heat pump cable/interface specific for the intended model of heat pump. Cables has specific interfacing electronics and connector for the pump.
There are 9 types of cables available.

On the side there is a micro USB port that is primary used to provide power to some heat pump models.  Thermia heat pumps and IVT 490 must be supplied with an external power supply. Other usage is to support advanced management, development, re-flash and for special solutions. Avoid connect a power source or computer to the USB port at the same time the H66 is connected to a heat pumps power (besides Thermia and IVT 490). This could cause damage to the Computer, H66 unit and the heat pump. If you for some reason need to use the USB port, disconnect the heat pump power cable (violet) from the cable interface first so the unit is powered from the USB jack instead. The setting for the port is 115200 baud.

Buttons
The device has two buttons on its side.
The Reset button will restart the unit, normally never used but if it gets stuck in an update or something it may be useful.

The Init button has two functions.
By holding it for 2 seconds, the unit will be put in AP (Access Point) mode so you can access the unit by connecting to it’s SSID ”Husdata H66”. See support section. By holding the button for 6 seconds until the green led goes dark the unit will load default / factory reset config.

LEDs
The Red led is flashing irregular when the unit has contact with and communicating with the heat pump.

The Green led is signalling the Network/Wi-Fi Connection status and should flash slowly in normal operations.

See Troubleshooting sections for LED details and troubleshooting.

Technical info H60
The H60 is a dual processor solution based on PIC and ESP controllers.
The PIC microconroller firmware is based on our proved H1 interface solutions and are handling all heat pump low level communications. The ESP8266 is a well known system on a chip platform and are handling WiFi network communications and hosting the web portal.

The PIC-controller Heatpump communications is performed independently from the ESP Wifi ESP controller. So if the ESP restarts, loose communications, or whaterver disturbance that could occur, it will not disturb or give trouble codes on the heatpump as the PIC controller remains unaffected.

H60 (not H66) is an open source platform. Hard core developers has the possibility to develop their own custom firmware. The H60 (not H66) USB interface module is fully compatible with the Arduino environment as an Wemos D1 Mini unit.
An Arduino working code example is provided in Github as a starting point for own development.
https://github.com/peterarandis/H60-OS

Specifications H60
Weight H60: 50 grams
Weight Interface cable: 50 grams
Size: (h, l, w) 28mm, 50mm, 90mm
Processor: ESP8266, 80Mhz, 4MB flash, 82kB RAM + PIC 2580
Power consumption 5V input: 100mA, 0.5W
Power consumption 12V input: 50mA, 0.7W
Max input voltage 18V
Input for USB power 5v
Input for USB Serial CH340 Interface 115200 baud
Network: Wifi 802.11b/g/n, 2.4Ghz

Technical info H66
The H66 is similar to H60 but has more rom/ram capacity, it was developed due to component shortage.
The H66 is based on an dual-core ESP32 system-on-a-chip solution.
First core is dedicated for handling heat pump low level communications, and the second core is for handling WiFi network communications and hosting the web portal, etc.

Specifications H66
Weight H66: 50 grams
Weight Interface cable: 50 grams
Size: (h, l, w) 28mm, 50mm, 90mm
Processor: ESP WROOOM 32 dual core, 240Mhz, 16MB flash, 327kB RAM
Power consumption 5V input: 120mA, 0.6W
Power consumption 12V input: 60mA, 0.8W
Max input voltage 25V
Input for USB power 5v
Input for USB Serial CH340 Interface 115200 baud
Network: Wifi 802.11b/g/n, 2.4Ghz