ChArrFifo.hpp C++ for Arduino or ESP, etc: Lets you save C strings to a fifo and retrieve them again in true fifo manner (First in - first out). Configurable in constructor as to how many strings are stored in each entry. Stores strings on heap and retains ownership of all heap stored items to free them again as strings are popped from fifo. Also frees all heap items on destruct or clear. Use errCause to get a C string describing last error cause. This is designed to be used with Arduino-like coding, i.e. Arduino, ESP, etc.. It has a rather small footprint. My intended use is to store topic and payload of MQTT messages not sent because of MQTT or WiFi unavailable, and send them when MQTT host is available. Usage code exerpt in file head.