multiple buttons

data/index.html

@@ -242,6 +242,9 @@
                     <option value="921600">921600</option>
                 </select>
             </div>
+            <button class="danger" onclick="doReset()" title="Pulse the target reset line">Reset</button>
+            <button onclick="doButton()" title="Momentary press of the target button / wake line">Button</button>
+            <button id="holdBtn" onclick="toggleHold()" title="Latch the button line held down (force-on) / release">Hold: off</button>
             <button onclick="clearTerminal()">Clear</button>
             <button onclick="reconnect()">Reconnect</button>
             <button id="logBtn" onclick="toggleLog()">Log: --</button>
@@ -306,6 +309,7 @@
         // Terminal setup
         const term = new Terminal({
             cursorBlink: true,
+            convertEol: true,   // target sends bare '\n'; treat it as CRLF so lines don't staircase
             fontSize: 14,
             fontFamily: 'Menlo, Monaco, "Courier New", monospace',
             theme: {
@@ -432,6 +436,7 @@
                     updateStatus('btStatus', msg.btConnected);
                     document.getElementById('heap').textContent = `Heap: ${msg.freeHeap}`;
                     updateLogUi(msg);
+                    updateButtonUi(msg);
                     
                     // Show WiFi info
                     const wifiInfo = document.getElementById('wifiInfo');
@@ -591,6 +596,34 @@
             return (bytes / 1024 / 1024).toFixed(1) + ' MB';
         }
 
+        // ---- Target control lines (reset / button) ----
+        function pulseLine(path, label) {
+            fetch(path + '?ms=200').then(r => r.text())
+                .then(t => term.writeln(`\r\n\x1b[33m[${label}] ${t.trim()}\x1b[0m`))
+                .catch(() => term.writeln(`\r\n\x1b[31m[${label} failed]\x1b[0m`));
+        }
+        function doReset() { pulseLine('/api/reset', 'reset'); }
+        function doButton() {
+            fetch('/api/button?ms=200').then(r => r.json()).then(s => {
+                updateButtonUi(s);
+                term.writeln('\r\n\x1b[33m[button] pulsed\x1b[0m');
+            }).catch(() => term.writeln('\r\n\x1b[31m[button failed]\x1b[0m'));
+        }
+        let holdOn = false;
+        function toggleHold() {
+            fetch('/api/button?latch=' + (holdOn ? 'off' : 'on')).then(r => r.json()).then(s => {
+                updateButtonUi(s);
+                term.writeln(`\r\n\x1b[33m[button] hold ${holdOn ? 'ON' : 'off'}\x1b[0m`);
+            }).catch(() => term.writeln('\r\n\x1b[31m[hold failed]\x1b[0m'));
+        }
+        function updateButtonUi(s) {
+            if (typeof s.buttonLatch === 'undefined') return;
+            holdOn = !!s.buttonLatch;
+            const b = document.getElementById('holdBtn');
+            b.textContent = 'Hold: ' + (holdOn ? 'ON' : 'off');
+            b.classList.toggle('danger', holdOn);
+        }
+
         // ---- SD logging controls ----
         let logOn = false;
         function toggleLog() {

platformio.ini

@@ -83,9 +83,12 @@ build_flags =
     ; --- target UART bridge (wire to the sensor's debug UART) ---
     -DTARGET_RX_PIN=44                 ; CONFIRM: dongle RX <- sensor TX
     -DTARGET_TX_PIN=43                 ; CONFIRM: dongle TX -> sensor RX
-    ; --- GPIO control lines to the target (reset / wake) ---
-    -DGPIO_RESET_PIN=2                 ; CONFIRM: -> sensor RST
-    -DGPIO_WAKE_PIN=1                  ; CONFIRM: -> sensor control/wake pin
+    ; --- GPIO control lines to the target (reset out / button out) ---
+    ; GPIO38 + GPIO39 are free pins on the T3-S3 RIGHT header, right next to the
+    ; UART pins TXD=43/RXD=44 -- so reset/button/TX/RX/GND all come off one row.
+    ; (GPIO2=SD MISO and GPIO1=battery ADC; GPIO4/12 are not broken out at all.)
+    -DGPIO_RESET_PIN=38                ; -> sensor RST (active-low pulse)
+    -DGPIO_WAKE_PIN=39                 ; -> sensor button/wake (active-low pulse)
     -DGPIO_CTRL_ACTIVE_LOW=1
     ; --- microSD on FSPI/SPI2 (separate bus from LoRa, which uses HSPI/SPI3) ---
     -DT3S3_SD_SCK=14

src/main.cpp

@@ -125,6 +125,9 @@ size_t     telnetLineLen[MAX_TELNET] = {0};
 volatile uint32_t rxBytes = 0;   // from target
 volatile uint32_t txBytes = 0;   // to target
 
+// Button line held active (latched) rather than momentary-pulsed.
+bool buttonLatched = false;
+
 // SD logging (T3-S3)
 bool sdAvailable = false;
 bool logEnabled  = true;          // ON by default once we have a date
@@ -190,6 +193,17 @@ static void gpioPulse(int pin, uint32_t ms, Stream* reply, const char* name) {
     if (reply) reply->printf("[ctrl] %s pulsed pin %d for %lu ms\r\n", name, pin, (unsigned long)ms);
 }
 
+// Hold a control line active (on) or release it (off) -- a latched "press".
+static void gpioLatch(int pin, bool on, Stream* reply, const char* name) {
+    if (pin < 0) { if (reply) reply->printf("[ctrl] %s pin not configured\r\n", name); return; }
+    int active   = GPIO_CTRL_ACTIVE_LOW ? LOW : HIGH;
+    int inactive = GPIO_CTRL_ACTIVE_LOW ? HIGH : LOW;
+    pinMode(pin, OUTPUT);
+    digitalWrite(pin, on ? active : inactive);
+    if (reply) reply->printf("[ctrl] %s latch=%s (pin %d %s)\r\n",
+                             name, on ? "on" : "off", pin, on ? "held" : "released");
+}
+
 // ============================================================================
 // SD logging (T3-S3)
 // ============================================================================
@@ -364,7 +378,7 @@ void handleCommand(const char* line, Stream* reply) {
     const char* args = line[n] ? line + n + 1 : line + n;
 
     if (!strcmp(verb, "help")) {
-        reply->print("[help] ~status ~reset [ms] ~wake [ms] ~baud <n> "
+        reply->print("[help] ~status ~reset [ms] ~button [ms|on|off] ~baud <n> "
                      "~port <int|usb|ext> ~log on|off ~gpio <pin> <0|1>\r\n"
                      "       ~mesh [on|off] ~psk <base64key> ~chan <name> <base64key> ~msg <text>\r\n"
                      "       (any non-~ line is sent to the target UART)\r\n");
@@ -372,8 +386,10 @@ void handleCommand(const char* line, Stream* reply) {
         printStatus(reply);
     } else if (!strcmp(verb, "reset")) {
         gpioPulse(GPIO_RESET_PIN, (uint32_t)strtoul(args, nullptr, 10), reply, "reset");
-    } else if (!strcmp(verb, "wake")) {
-        gpioPulse(GPIO_WAKE_PIN, (uint32_t)strtoul(args, nullptr, 10), reply, "wake");
+    } else if (!strcmp(verb, "wake") || !strcmp(verb, "button")) {
+        if (!strncmp(args, "on", 2))       { gpioLatch(GPIO_WAKE_PIN, true,  reply, "button"); buttonLatched = true; }
+        else if (!strncmp(args, "off", 3)) { gpioLatch(GPIO_WAKE_PIN, false, reply, "button"); buttonLatched = false; }
+        else { gpioPulse(GPIO_WAKE_PIN, (uint32_t)strtoul(args, nullptr, 10), reply, "button"); buttonLatched = false; }
     } else if (!strcmp(verb, "baud")) {
         uint32_t b = strtoul(args, nullptr, 10);
         if (b) { setBaudRate(b); reply->printf("[ctrl] baud=%lu\r\n", (unsigned long)b); }
@@ -495,6 +511,7 @@ void handleWebSocketMessage(AsyncWebSocketClient* client, uint8_t* data, size_t
             r["baudSerial1"] = baudSerial1;
             r["rx"] = rxBytes; r["tx"] = txBytes;
             r["log"] = logEnabled; r["ntp"] = ntpSynced; r["sd"] = sdAvailable;
+            r["buttonLatch"] = buttonLatched;
 #if BOARD_T3S3
             r["logfile"] = logFile ? logPath : "";
 #endif
@@ -539,6 +556,7 @@ static String statusJson() {
     doc["baudSerial1"] = baudSerial1;
     doc["rx"] = rxBytes; doc["tx"] = txBytes;
     doc["log"] = logEnabled; doc["ntp"] = ntpSynced; doc["sd"] = sdAvailable;
+    doc["buttonLatch"] = buttonLatched;
 #if BOARD_T3S3
     doc["logfile"] = logFile ? logPath : "";
 #endif
@@ -563,11 +581,23 @@ void setupWebServer() {
         gpioPulse(GPIO_RESET_PIN, ms, nullptr, "reset");
         req->send(200, "text/plain", "reset pulsed\n");
     });
-    server.on("/api/wake", HTTP_GET, [](AsyncWebServerRequest* req) {
+    // Momentary pulse (?ms=), or latch the line held (?latch=on|off|1|0).
+    auto doButton = [](AsyncWebServerRequest* req) {
+        if (req->hasParam("latch")) {
+            String v = req->getParam("latch")->value();
+            bool on = (v == "1" || v.startsWith("on") || v == "true");
+            gpioLatch(GPIO_WAKE_PIN, on, nullptr, "button");
+            buttonLatched = on;
+            req->send(200, "application/json", statusJson());
+            return;
+        }
         uint32_t ms = req->hasParam("ms") ? req->getParam("ms")->value().toInt() : 0;
-        gpioPulse(GPIO_WAKE_PIN, ms, nullptr, "wake");
-        req->send(200, "text/plain", "wake pulsed\n");
-    });
+        gpioPulse(GPIO_WAKE_PIN, ms, nullptr, "button");
+        buttonLatched = false;
+        req->send(200, "application/json", statusJson());
+    };
+    server.on("/api/button", HTTP_GET, doButton);
+    server.on("/api/wake", HTTP_GET, doButton);   // back-compat alias
     server.on("/api/baud", HTTP_GET, [](AsyncWebServerRequest* req) {
         if (req->hasParam("baud")) setBaudRate(req->getParam("baud")->value().toInt());
         req->send(200, "application/json", statusJson());