Hi Issac - i was looking at these as Mesh Relay + Friends for our project powered via Solar Panel and a rechargeable battery pack - BUT … i read on the Nordic Web Site that the nRF52840 has MESH compatability issues the version below in BOLD is compatible but the second version is not - i cant find the oard version on the SEEED web site but watch out for this - also Nordic don’t actually explain what limited compatibility means!!
If you work it our can you paste an answer back here - thanks - RB
|nRF52840_xxAA|PCA10056|S140 v6.0.0/v6.1.0/v6.1.1/v7.0.1/v7.2.0
S113 v7.0.1/v7.2.0
|nRF52840_xxAA ([limited compatibility]|PCA10059|S140 v6.0.0/v6.1.0/v6.1.1/v7.0.1/v7.2.0
S113 v7.0.1/v7.2.0
Source: ITS HERE