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edgecollective · May 21, 2024 · 97ae393 · 97ae393
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diff --git a/img/ham/Core1262-LF-details-inter.jpg b/img/ham/Core1262-LF-details-inter.jpg
diff --git a/img/ham/circuitpython_adafruit_feather_express_nRF52840_Schematic_REV-D.png b/img/ham/circuitpython_adafruit_feather_express_nRF52840_Schematic_REV-D.png
diff --git a/img/ham/itsy_bitsy_nrf52_pin_assign.png b/img/ham/itsy_bitsy_nrf52_pin_assign.png
diff --git a/img/ham/itsy_bitsy_nrf52_pin_assign_full.png b/img/ham/itsy_bitsy_nrf52_pin_assign_full.png
diff --git a/img/ham/jlink_comm.png b/img/ham/jlink_comm.png
diff --git a/img/ham/jlink_nrf52dongle.png b/img/ham/jlink_nrf52dongle.png
diff --git a/img/ham/pca10059_pinout.png b/img/ham/pca10059_pinout.png
diff --git a/index.html b/index.html
@@ -223,28 +223,28 @@ <h1><a name="notebook"></a>Research Notebook</h1>
   <div class="post">
     <div class="note-contents">
       <div class="image">
-        <a href="/notes/uvf/">
-          <img src="/img/uvf/uvf.png"/>
+        <a href="/notes/ham/">
+          <img src="/img/ham/ham.png"/>
         </a>
       </div>
       <div class="text">
-        <h3><a href="/notes/uvf/">UV Spectrophotometry</a></h3>
-        <p>Designing a DIY UV Spectrophotometer</p>
-        <em>Updated: 2024-05-19</em>
+        <h3><a href="/notes/ham/">Notes on Ham Radio</a></h3>
+        <p>Notes on Ham Radio</p>
+        <em>Updated: 2024-05-21</em>
       </div>
     </div>
   </div>
   <div class="post">
     <div class="note-contents">
       <div class="image">
-        <a href="/notes/ham/">
-          <img src="/img/ham/ham.png"/>
+        <a href="/notes/uvf/">
+          <img src="/img/uvf/uvf.png"/>
         </a>
       </div>
       <div class="text">
-        <h3><a href="/notes/ham/">Notes on Ham Radio</a></h3>
-        <p>Notes on Ham Radio</p>
-        <em>Updated: 2024-05-18</em>
+        <h3><a href="/notes/uvf/">UV Spectrophotometry</a></h3>
+        <p>Designing a DIY UV Spectrophotometer</p>
+        <em>Updated: 2024-05-19</em>
       </div>
     </div>
   </div>

diff --git a/notes/ham/index.html b/notes/ham/index.html
@@ -471,6 +471,183 @@ <h1>Sat May 18 08:24:22 PM EDT 2024</h1>
 <p><a href="https://github.com/orgs/micropython/discussions/14356">https://github.com/orgs/micropython/discussions/14356</a></p>
 <p>beepberry <a href="https://www.theverge.com/23727218/beepberry-cyberdeck-mini-computer-raspberry-pi-beeper-messenger">here</a>
 <a href="https://docs.m5stack.com/en/stamp/stamp_catm">https://docs.m5stack.com/en/stamp/stamp_catm</a></p>
+<h1>Sun May 19 06:42:24 PM EDT 2024</h1>
+<p>Starting to try to add adafruit bootloader...</p>
+<p><a href="https://github.com/adafruit/Adafruit_nRF52_Bootloader">https://github.com/adafruit/Adafruit_nRF52_Bootloader</a></p>
+<p>&quot;Flashing nRF52840 USB Key bootloader&quot;:
+<a href="https://forums.adafruit.com/viewtopic.php?t=206837">https://forums.adafruit.com/viewtopic.php?t=206837</a></p>
+<p><a href="https://www.rototron.info/circuitpython-nrf52840-dongle-openocd-pi-tutorial/">https://www.rototron.info/circuitpython-nrf52840-dongle-openocd-pi-tutorial/</a></p>
+<p><a href="https://learn.adafruit.com/circuitpython-on-the-nrf52/nrf52840-bootloader">https://learn.adafruit.com/circuitpython-on-the-nrf52/nrf52840-bootloader</a></p>
+<p><a href="https://community.platformio.org/t/using-nordic-nrf52840-dongle-under-arduino-framework-with-platformio-vscode/24776">https://community.platformio.org/t/using-nordic-nrf52840-dongle-under-arduino-framework-with-platformio-vscode/24776</a></p>
+<p><a href="https://forums.adafruit.com/viewtopic.php?t=151127&amp;start=15">https://forums.adafruit.com/viewtopic.php?t=151127&amp;start=15</a></p>
+<p>pinout for jlink mini <a href="https://embeddedcomputing.weebly.com/segger-j-link-edu-mini-programmer-debugger.html">https://embeddedcomputing.weebly.com/segger-j-link-edu-mini-programmer-debugger.html</a></p>
+<p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/56710/programming-and-debugging-nrf52840-dongle-using-external-programmer-j-link">j-link connections</a></p>
+<p>j-link user manual <a href="https://devzone.nordicsemi.com/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-eaaab8b09e814a12b338ab2b0c1bd84c/UM08001_5F00_JLink.pdf">here</a></p>
+<p><img src="/img/ham/jlink_nrf52dongle.png" alt=""></p>
+<p><img src="/img/ham/jlink_comm.png" alt=""></p>
+<p>j-link hack:</p>
+<ul>
+<li>purple -- vref</li>
+<li>blue -- SWDIO</li>
+<li>black -- GND</li>
+<li>white -- SWDCLK</li>
+</ul>
+<p>followed <a href="https://learn.adafruit.com/circuitpython-on-the-nrf52/nrf52840-bootloader">https://learn.adafruit.com/circuitpython-on-the-nrf52/nrf52840-bootloader</a></p>
+<p>installed nrfutil as per suggestion</p>
+<p>used USB to power dongle; then hooked up SW pins as per 'j-link hack' pin assignments above</p>
+<p>downloaded proper bootloader hex file for pca10059 from here: <a href="https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases/tag/0.9.0">https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases/tag/0.9.0</a></p>
+<p>used commands:</p>
+<pre><code>nrfjprog -f nrf52 --recover
+nrfjprog -f nrf52 --eraseall
+nrfjprog -f nrf52 --program pca10059_bootloader-0.9.0_s140_6.1.1.hex
+</code></pre>
+<p>main guide:</p>
+<p><a href="https://meshtastic.discourse.group/t/wip-diy-nrf82540-nicerf-868-4-2-inch-epaper/5552/20?page=2">https://meshtastic.discourse.group/t/wip-diy-nrf82540-nicerf-868-4-2-inch-epaper/5552/20?page=2</a></p>
+<p>pca10059 e-ink variant:</p>
+<pre><code>// NiceRF 868 LoRa module
+#define USE_SX1262
+#define SX126X_CS (0 + 31)     // LORA_CS     P0.31
+#define SX126X_DIO1 (0 + 29)   // DIO1        P0.29
+#define SX126X_BUSY (0 + 2)    // LORA_BUSY   P0.02
+#define SX126X_RESET (32 + 15) // LORA_RESET  P1.15
+#define SX126X_TXEN (32 + 13)  // TXEN        P1.13 NiceRF 868 dont use
+#define SX126X_RXEN (32 + 10)  // RXEN        P1.10 NiceRF 868 dont use
+</code></pre>
+<p>pico variant:</p>
+<pre><code>#define LORA_SCK 10
+#define LORA_MISO 12
+#define LORA_MOSI 11
+#define LORA_CS 3
+
+#define LORA_DIO0 RADIOLIB_NC
+#define LORA_RESET 15
+#define LORA_DIO1 20
+#define LORA_DIO2 2
+#define LORA_DIO3 RADIOLIB_NC
+
+#ifdef USE_SX1262
+#define SX126X_CS LORA_CS
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+#define SX126X_DIO2_AS_RF_SWITCH
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+#endif
+</code></pre>
+<p>reference for waveshare module <a href="https://www.waveshare.com/core1262-868m.htm">https://www.waveshare.com/core1262-868m.htm</a></p>
+<p><img src="/img/ham/Core1262-LF-details-inter.jpg" alt=""></p>
+<p><img src="/img/ham/pca10059_pinout.png" alt=""></p>
+<p>Was able to install CPY on dongle using UF2 here: <a href="https://circuitpython.org/board/pca10059/">https://circuitpython.org/board/pca10059/</a></p>
+<p>building custom meshtastic firmware <a href="https://meshtastic.org/docs/development/firmware/build/">here</a></p>
+<h1>Mon May 20 09:56:53 PM EDT 2024</h1>
+<p>Itsy Bitsy pinout</p>
+<p><img src="/img/ham/itsy_bitsy_nrf52_pin_assign.png" alt=""></p>
+<p>TWC-4 assignment, using Adafruit nRF52 Feather Express:</p>
+<pre><code>// LEDs
+#define PIN_LED1 (32 + 10) // Blue LED        P1.10
+#define PIN_LED2 (32 + 15) // Built in Green  P1.15
+
+// RGB NeoPixel LED2
+// #define PIN_LED1 (0 + 8) Red
+// #define PIN_LED1 (32 + 9) Green
+// #define PIN_LED1 (0 + 12) Blue
+
+#define LED_BUILTIN PIN_LED1
+#define LED_CONN PIN_LED2
+
+#define LED_GREEN PIN_LED1
+#define LED_BLUE PIN_LED2
+
+#define LED_STATE_ON 0 // State when LED is litted
+
+/*
+ * Buttons
+ */
+#define PIN_BUTTON1 (32 + 2) // BTN_DN           P1.02 Built in button
+
+/*
+ * Analog pins
+ */
+#define PIN_A0 (0 + 29) // using VDIV (A6 / P0.29)
+
+static const uint8_t A0 = PIN_A0;
+#define ADC_RESOLUTION 14
+
+// Other pins
+#define PIN_AREF (-1) // AREF            Not yet used
+
+static const uint8_t AREF = PIN_AREF;
+
+/*
+ * Serial interfaces
+ */
+#define PIN_SERIAL1_RX (0 + 24)
+#define PIN_SERIAL1_TX (0 + 25)
+
+// Connected to Jlink CDC
+#define PIN_SERIAL2_RX (-1)
+#define PIN_SERIAL2_TX (-1)
+
+/*
+ * SPI Interfaces
+ */
+#define SPI_INTERFACES_COUNT 1
+
+#define PIN_SPI_MISO (0 + 15) // MISO      P0.15
+#define PIN_SPI_MOSI (0 + 13) // MOSI      P0.13
+#define PIN_SPI_SCK (0 + 14)  // SCK       P0.14
+
+static const uint8_t SS = (0 + 6); // LORA_CS   P0.6
+static const uint8_t MOSI = PIN_SPI_MOSI;
+static const uint8_t MISO = PIN_SPI_MISO;
+static const uint8_t SCK = PIN_SPI_SCK;
+
+////#define USE_EINK
+#define USE_SSD1306
+
+/*
+ * Wire Interfaces
+ */
+#define WIRE_INTERFACES_COUNT 1
+
+#define PIN_WIRE_SDA (0 + 12) // SDA     P0.12
+#define PIN_WIRE_SCL (0 + 11) // SCL     P0.11
+
+// NiceRF 868 LoRa module
+#define USE_SX1262
+#define USE_LLCC68
+
+#define SX126X_CS (0 + 6)     // LORA_CS     P0.06
+#define SX126X_DIO1 (0 + 7)   // DIO1        P0.07
+#define SX126X_BUSY (0 + 26)  // LORA_BUSY	  P0.26
+#define SX126X_RESET (0 + 27) // LORA_RESET  P0.27
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+
+#define PIN_GPS_EN (-1)
+#define PIN_GPS_PPS (-1) // Pulse per second input from the GPS
+
+#define GPS_RX_PIN PIN_SERIAL1_RX
+#define GPS_TX_PIN PIN_SERIAL1_TX
+
+// Battery
+// The battery sense is hooked to pin A6 (0.29)
+#define BATTERY_PIN PIN_A0
+// and has 12 bit resolution
+#define BATTERY_SENSE_RESOLUTION_BITS 12
+#define BATTERY_SENSE_RESOLUTION 4096.0
+#undef AREF_VOLTAGE
+#define AREF_VOLTAGE 3.0
+#define VBAT_AR_INTERNAL AR_INTERNAL_3_0
+#define ADC_MULTIPLIER (2.0F)
+</code></pre>
+<p>NOTE: need to add these definitions for the itsybitsy meshtastic firmware (and choose free pins):</p>
+<pre><code>#define SX126X_TXEN (32 + 13)  // TXEN        P1.13 NiceRF 868 dont use
+#define SX126X_RXEN (32 + 10)  // RXEN        P1.10 NiceRF 868 dont use
+</code></pre>
+<p>instructions for creating uf2 for nrf52 boards <a href="https://github.com/adafruit/Adafruit_nRF52_Bootloader">https://github.com/adafruit/Adafruit_nRF52_Bootloader</a></p>
+<p>used</p>
+<pre><code>python3 uf2conv.py firmware.bin -c -b 0x26000 -f 0xADA52840
+</code></pre>
 
 
     </div>

diff --git a/notes/uvf/index.html b/notes/uvf/index.html
@@ -350,7 +350,9 @@ <h1>Sun May 19 06:02:51 PM EDT 2024</h1>
 <ul>
 <li>colorimeter product guide: <a href="https://blog.iorodeo.com/open-colorimeter-product-guide/">https://blog.iorodeo.com/open-colorimeter-product-guide/</a></li>
 <li>uv sensor board in particular <a href="https://iorodeo.com/products/as7331-uv-sensor-board?pr_prod_strat=e5_desc&amp;pr_rec_id=037acace2&amp;pr_rec_pid=7328730316915&amp;pr_ref_pid=7363616571507&amp;pr_seq=uniform">https://iorodeo.com/products/as7331-uv-sensor-board?pr_prod_strat=e5_desc&amp;pr_rec_id=037acace2&amp;pr_rec_pid=7328730316915&amp;pr_ref_pid=7363616571507&amp;pr_seq=uniform</a></li>
+<li>current-controlled LED board <a href="https://github.com/iorodeo/i_control_led">https://github.com/iorodeo/i_control_led</a></li>
 </ul>
+<p>What would be required to make their system work for UV254?</p>
 
 
     </div>