AquaMQTT
About the AquaMQTT PCB
AquaMQTT is an open source PCB design by tspopp, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 45 × 65 mm, with 12 components from 10 distinct parts.
Other key parts include the SN74LVC2T45DCUR. By type, the board carries 8 connectors, 2 ICs and 2 resistors.
It belongs with the iot & wireless designs in this gallery.
From the project
Monitor and control your Groupe Atlantic (Explorer, Calypso, Aquawin,...) heat pump using MQTT
The AquaMQTT PCB Board is intended to be installed between the communication wires of the DHW HMI Controller and the DHW Mainboard. To enable the communication to both HMI Controller and DHW Mainboard, the board provides two individual USART entities in One-Wire Mode. The Arduino ESP32 on the board runs AquaMQTT, providing communication via WiFi/MQTT while being powerful enough to handle any time critical USART communication with the heat pumps hmi controller and main board.
Main components on the AquaMQTT
AquaMQTT bill of materials (BOM)
12 components, 10 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | SN74LVC2T45DCUR | SSOP-8_2.95x2.8mm_P0.65mm | U1, U2 |
| 1 | C5116483 Serial | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | RAST MAIN | RAST_3517-06_(2.5MM)_2 COPY | J2 |
| 1 | C32713277 DHW MAIN | PinHeader_2x04_P2.54mm_Vertical | J3 |
| 1 | RAST HMI | RAST_3517-06_(2.5MM)_2 COPY | J4 |
| 1 | C7499333 Nano L | PinSocket_1x15_P2.54mm_Vertical | J5 |
| 1 | C7499333 Nano R | PinSocket_1x15_P2.54mm_Vertical | J6 |
| 1 | C32713277 DHW HMI | PinHeader_2x04_P2.54mm_Vertical | J7 |
| 1 | C5360898 Passthrough | PinHeader_1x02_P2.54mm_Vertical | J8 |
| 2 | R10K R10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
AquaMQTT design files
The KiCad project lives in the tspopp/AquaMQTT repository on GitHub; these links point at the commit this page was built from.
AquaMQTT: common questions
How big is the AquaMQTT PCB?
The AquaMQTT measures 45 × 65 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the AquaMQTT?
12 components, from 10 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the AquaMQTT design files?
From the tspopp/AquaMQTT repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the AquaMQTT design in my own project?
Yes, under the terms of its Apache-2.0 license, which tspopp chose for the repository.
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