From 803db81c8f2d20d91be0b84b930fe0048b86ca0c Mon Sep 17 00:00:00 2001
From: Harald Barth <haba@kth.se>
Date: Sat, 6 Aug 2022 19:07:35 +0200
Subject: [PATCH] try to recover from ringbuffer read problem

---
 WifiESP32.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/WifiESP32.cpp b/WifiESP32.cpp
index 22a02ca..917785e 100644
--- a/WifiESP32.cpp
+++ b/WifiESP32.cpp
@@ -236,6 +236,17 @@ void WifiESP::loop() {
     if (clientId >= 0) {
       if ((unsigned int)clientId > clients.size()) {
 	// something is wrong with the ringbuffer position
+	// or client has disconnected
+	outboundRing->info();
+	// try to recover by reading out to nowhere
+	int count=outboundRing->count();
+	for(int i=0;i<count;i++) {
+	  int c = outboundRing->read();
+	  if (c < 0) {
+	    DIAG(F("Ringread fail at %d"),i);
+	    break;
+	  }
+	}
 	outboundRing->info();
       } else {
 	// we have data to send in outboundRing