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Wireless Analog Terminal Bell using M5Stick-C
#include <WiFi.h>
#include <WebServer.h>
#define OUTPUT_PIN 26
char ssid[] = "YOUR-WIFI-SSID";
char pass[] = "YOUR-WIFI-PASSWORD";
WebServer server(80);
void setup() {
pinMode(OUTPUT_PIN, OUTPUT);
digitalWrite(OUTPUT_PIN, LOW);
Serial.begin(115200);
WiFi.begin();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, pass);
unsigned long start = millis();
while (WiFi.status() != WL_CONNECTED && millis() - start < 30000) {
Serial.print(".");
delay(1000);
}
if (WiFi.status() != WL_CONNECTED) {
Serial.println("failed to connect WiFi.");
delay(1000);
ESP.restart();
}
Serial.println(WiFi.localIP());
server.on("/", []() {
int wait = 50;
String wait_s = server.arg("wait");
if (wait_s != "")
wait = wait_s.toInt();
digitalWrite(OUTPUT_PIN, HIGH);
delay(wait);
digitalWrite(OUTPUT_PIN, LOW);
server.send(200, "text/plain", "OK\n");
});
server.onNotFound([]{ server.send(404, "text/plain", "Not Found"); });
server.begin();
}
void loop() {
server.handleClient();
if (WiFi.status() != WL_CONNECTED) {
Serial.println("disconnected.");
delay(1000);
ESP.restart();
}
}
#!/usr/bin/ruby
require 'pty'
require 'open-uri'
BELL_URL = 'http://192.168.0.123/' # Change this to your ESP32 address
# Avoid double proxy
if ENV['PTY_PROXY']
warn "pty-proxy is already active!"
exec ENV['SHELL']
end
ENV['PTY_PROXY'] = 'ACTIVE'
# Track escape sequences to avoid removing "\a" in them
@esc_seq = 0
@osc_mode = false
# Remove "\a" from buf (unless it is in escape sequences)
def remove_bell(buf)
buf2 = String.new(capacity: 4096)
buf.each_char do |c|
if @esc_seq == 0 && c == "\a"
Thread.new do
open(BELL_URL).close rescue nil
end
else
buf2 << c
end
if @esc_seq > 0
@osc_mode = true if @esc_seq == 1 && c == "]"
if c.match(@osc_mode ? /[\a\x1b]/ : /[^0-9;?\[]/)
@esc_seq = 0
@osc_mode = false
else
@esc_seq += 1
end
elsif c == "\x1b"
@esc_seq = 1
end
end
buf2
end
# Launch shell in pty
Signal.trap(:CHLD, 'IGNORE')
system "stty raw -echo 2> /dev/null"
size = %x(stty size).split(/\s+/)
p = PTY.spawn %(stty rows #{size[0]} cols #{size[1]}; exec '#{ENV['SHELL']}')
# When window size is changed, notify it to the shell
size_changed = IO.pipe
Signal.trap(:WINCH) do
size_changed[1].write ' '
end
# Proxy input/output
@buf = String.new(capacity: 4096)
until p[0].closed? || STDIN.closed?
s = IO.select [p[0], STDIN, size_changed[0]]
if s[0][0] == size_changed[0]
size_changed[0].readpartial(4096)
size = %x(stty size).split(/\s+/)
system("stty rows #{size[0]} cols #{size[1]}", in: p[0])
Process.kill :WINCH, p[2]
next
end
while s0 = s[0][0]
s[0].shift
out = s0 == STDIN ? out = p[1] : out = STDOUT
begin
buf = s0.readpartial(4096, @buf)
buf = remove_bell(buf) if s0 == p[0]
out.write buf
out.flush
rescue EOFError
p[0].close
p[1].close
system "stty -raw 2> /dev/null"
exit
end
end
end
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