On error on rtt close app and add hint text

src/hardwario/chester/cli/app.py

@@ -93,7 +93,12 @@ def command_console(ctx, reset, latency, history_file, console_file):
         if reset:
             prog.reset()
             prog.go()
-        Console(prog, history_file, console_file, latency=latency)
+        c = Console(prog, history_file, console_file, latency=latency)
+
+        click.echo('TIP: After J-Link connection, it is crucial to power cycle the target device; otherwise, the CPU debug mode results in a permanently increased power consumption.')
+
+        if c.exception:
+            raise c.exception
 
 
 def validate_pib_param(ctx, param, value):

src/hardwario/chester/console.py

@@ -2,6 +2,7 @@
 import os
 import asyncio
 import logging
+import sys
 import re
 from functools import partial
 from datetime import datetime
@@ -23,8 +24,7 @@
 from prompt_toolkit.application.current import get_app
 from prompt_toolkit.lexers import Lexer
 from prompt_toolkit.styles.named_colors import NAMED_COLORS
-
-from .nrfjprog import NRFJProg, NRFJProgRTTNoChannels
+from .nrfjprog import NRFJProg, NRFJProgRTTNoChannels, NRFJProgException
 
 
 def getTime():
@@ -231,6 +231,9 @@ async def task_rtt_read():
                                 line = prog.rtt_read(channel)
                             except NRFJProgRTTNoChannels:
                                 return
+                            except NRFJProgException as e:
+                                self.exit(e)
+                                return
                             if line:
                                 # buffer.insert_text(line.replace('\r', ''))
                                 for sline in line.splitlines():
@@ -263,3 +266,7 @@ def accept(buff):
         self.app.run()
 
         prog.rtt_stop()
+
+    def exit(self, exception=None):
+        self.exception = exception
+        self.app.exit()