Hi,
I did the Le Puy route in June/July this year. Wi-Fi was available but not as widely as on the Camino Francés in Spain. I had to frequently rely on my phone for internet to such an extent that I used up my entire data allowance well before I had finished the route. Rarely available in café-bars unlike in Spain. In the Gîtes where it was available it could be very weak/slow.
Bin chemin,
John.