The MULTI-Module firmware is provided for free under the GNU General Public License v3.0.
The developers do not receive any payment from any of the manufacturers of MULTI-Modules whose products use this firmware.
If you like this project and enjoy using it, please consider making a donation. Donations are used to fund test hardware to develop and integrate more models.
Donations to the MULTI-Module project can be made via PayPal by clicking the link below.
Every donation helps and is greatly appreciated, no matter the amount!