Hi, On Mon, Dec 31, 2018 at 02:31:22PM +0100, Pablo Ledergerber wrote: > > The freemodbus library uses the TCP Raw library and the upd discovery > function the netconn api. We have one thread for modbusTCP,
The RAW API is not thread-safe, you can't use it within a thread (other than the lwIP core thread). See http://www.nongnu.org/lwip/2_1_x/pitfalls.html Sylvain
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