Let $C = \mathbb{Z}/d\mathbb{Z}$ ($d \ge 0$).
Let $D = \langle a_c : c \in C, t \mid a^2_c = t^d = 1, ta_ct^{-1} = a_{c+1} \rangle$.
let $E$ be the subgroup generated by $\{a_c : c \in C\}$ and let $T$ be the Cayley graph of $E$ with this generating set (note that $T$ is a tree). There is then a natural action of $D$ on $T$, where $E$ acts by left translation and $t$ acts by conjugation on $E$.
(edit) Let $P$ be the product of all pairs of complementary half-trees, equipped with the product topology. Then I think (?) for $d \neq 1$ there will be a minimal closed $D$-invariant subspace $X$ of $P$, consisting of the closure of the set of points in $P$ defined by infinite rays in $T$. Finally, define $G$ to be the topological full group of the action of $D$ on $X$.
The space $X$ is homeomorphic to the Cantor set except for $d \in \{1,2\}$. If $d > 2$, I think the description of $G$ I gave is just another way to build the Higman–Thompson group $G_{d-1,d}$, which is very well-studied. In particular, as shown by Higman, it is a finitely presented group that is either simple ($d$ odd) or has a simple subgroup of index $2$ ($d$ even). But the case $d=0$ also seems fairly natural to me.
Has this particular group (where $d=0$) been studied? If so, what basic properties are known? (I know that some things can be deduced from general results about topological full groups, e.g. that the derived group of $G$ is finitely generated and simple; but for example it's not clear to me how to compute the abelianization of $G$.)
