diff --git a/docs/software/nrf52-TODO.md b/docs/software/nrf52-TODO.md
index cdf57fac9..a0743de44 100644
--- a/docs/software/nrf52-TODO.md
+++ b/docs/software/nrf52-TODO.md
@@ -8,6 +8,7 @@ Minimum items needed to make sure hardware is good.
 - DONE get old radio driver working on NRF52
 - DONE basic test of BLE
 - DONE get a debug 'serial' console working via the ICE passthrough feature
+- add a hard fault handler
 - switch to RadioLab? test it with current radio. https://github.com/jgromes/RadioLib
 - use "variants" to get all gpio bindings
 - plug in correct variants for the real board
diff --git a/src/nrf52/main-nrf52.cpp b/src/nrf52/main-nrf52.cpp
index 70e733b90..255b80101 100644
--- a/src/nrf52/main-nrf52.cpp
+++ b/src/nrf52/main-nrf52.cpp
@@ -17,7 +17,7 @@ static inline void debugger_break(void)
 void __attribute__((noreturn)) __assert_func(const char *file, int line, const char *func, const char *failedexpr)
 {
     DEBUG_MSG("assert failed %s: %d, %s, test=%s\n", file, line, func, failedexpr);
-    debugger_break();
+    // debugger_break(); FIXME doesn't work, possibly not for segger
     while (1)
         ; // FIXME, reboot!
 }
diff --git a/src/rf95/RadioLibInterface.cpp b/src/rf95/RadioLibInterface.cpp
index 9c772fc66..57d64a3c5 100644
--- a/src/rf95/RadioLibInterface.cpp
+++ b/src/rf95/RadioLibInterface.cpp
@@ -91,6 +91,8 @@ void RadioLibInterface::loop()
     if (wasPending) {
         pending = ISR_NONE; // If the flag was set, it is _guaranteed_ the ISR won't be running, because it masked itself
 
+        DEBUG_MSG("Handling a LORA interrupt %d!\n", wasPending);
+
         if (wasPending == ISR_TX)
             handleTransmitInterrupt();
         else if (wasPending == ISR_RX)
@@ -193,7 +195,7 @@ void RadioLibInterface::startSend(MeshPacket *txp)
     size_t numbytes = beginSending(txp);
 
     int res = iface.startTransmit(radiobuf, numbytes);
-    assert(res);
+    assert(res == ERR_NONE);
 
     // Must be done AFTER, starting transmit, because startTransmit clears (possibly stale) interrupt pending register bits
     enableInterrupt(isrTxLevel0);
diff --git a/src/rf95/SX1262Interface.cpp b/src/rf95/SX1262Interface.cpp
index 7d5bc4f22..88dfae80e 100644
--- a/src/rf95/SX1262Interface.cpp
+++ b/src/rf95/SX1262Interface.cpp
@@ -27,7 +27,7 @@ bool SX1262Interface::init()
     int res = lora.begin(freq, bw, sf, cr, syncWord, power, currentLimit, preambleLength, tcxoVoltage, useRegulatorLDO);
     DEBUG_MSG("LORA init result %d\n", res);
 
-    if (res != ERR_NONE)
+    if (res == ERR_NONE)
         res = lora.setCRC(SX126X_LORA_CRC_ON);
 
     return res == ERR_NONE;