On Wednesday, July 12, 2023 6:29:50 AM CEST [email protected] wrote: > Hi All, > > I've just started using batman and was trying to see if I could get it to > work over a serial radio link such as the simple serial devices commonly > used in cheap drone telemetry. The goal here is to enable low bandwidth but > adhoc ip networking. > > I had set up a pair of radios to connect using pppd and I was wondering if I > could utilise batman to try and create a mesh. An example of setting up the > serial ports as ppp interfaces: > > $ sudo pppd /dev/ttyUSB0 57600 noauth nodetach 10.42.5.5: > > That works fine but applying batman to that interface was unsuccessful. I > think that was due to limitations in the ppp and interfaces created by > pppd: e.g. > > $ sudo batctl if add ppp0 > Error - failed to add interface ppp0: Invalid argument > > The interface ppp0 was specified as POINTTOPOINT e.g. > > $ ip link > $ ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel > state UNKNOWN mode DEFAULT group default qlen 3 > > I'm not an expert in this so don't have full visibility of all the tools > available. I was wondering if there were better ways to set this up, > possibly not using pppd? Any guidance would be appreciated. > > cheers > Peter
Hi Peter,
batman-adv requires an Ethernet compatible interface (Layer 2) to operate. PPP
interfaces are Layer 3 interfaces (IP Layer), so that will not work. You could
make a L2 tunnel over your PPP interface such as l2tp or vxlan and use that.
Or perhaps there is a different/better way to enable an Ethernet Link over your
drone radio directly ....
Cheers,
Simon
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