Improve writing.minimalist

1 files changed, 14 insertions, 24 deletions

diff --git a/_log/etlas.md b/_log/etlas.md
index 9f09322..d0ff35d 100644
--- a/_log/etlas.md
+++ b/_log/etlas.md
@@ -6,8 +6,7 @@ project: true
 thumbnail: thumb_sm.jpg
 ---
 
-Repurposed the [e-reader](../e-reader/) for regular use as a news, stocks, and
-weather dashboard.
+Repurposed the [e-reader](../e-reader/) for regular use as a news tracker.
 
 <table style="border: none;">
   <tr style="border: none;">
@@ -19,14 +18,13 @@ weather dashboard.
   </tr>
 </table>
 
-Swapped out the ESP-32-WROOM for an ESP32 NodeMCU D1—smaller, better form
+Swapped out the ESP-WROOM-32 for an ESP32 NodeMCU D1—smaller, better form
 factor. Connected a DHT22 sensor for temperature and humidity data.
 
-Weather: 26µs/50µs/70µs pulses from the DHT22's single-wire protocol are too
-fast for ESP32 standard APIs. Ported <a
+Weather: DHT22's 26µs/50µs/70µs pulses are too fast for the ESP32 standard
+APIs. Ported the following bit banging <a
 href="https://github.com/Fonger/ESP8266-RTOS-DHT" class="external"
-target="_blank" rel="noopener noreferrer">this</a> clever bit-banging from
-ESP8266 to ESP32:
+target="_blank" rel="noopener noreferrer">routine</a> from ESP8266:
 
 ```
 static inline int dht_await_pin_state(int state, int timeout)
@@ -44,8 +42,6 @@ static inline int dht_await_pin_state(int state, int timeout)
 
 static inline int dht_get_raw_data(unsigned char buf[BUFLEN])
 {
-    /* init code and preamble */
-
     for (i = 0; i < BUFLEN; i++) {
         if (!(pwl = dht_await_pin_state(1, 50))) {
             rc = 4;
@@ -63,23 +59,17 @@ static inline int dht_get_raw_data(unsigned char buf[BUFLEN])
 }
 ```
 
-Stocks: Obtained two weeks EOD data from Polygon.io—maximum possible with 512
-KB RAM. Deployed a simple Flask API on VPS to manage the watchlist and relay
-the feed. Wrapped the API in FastCGI and exposed it through chroot-ed 
-htpasswd + slowcgi + httpd—battle-tested OpenBSD base-system tools.
-
-Custom stepped graph works but the code is crude. vTaskDelay() is needed to
-keep the watchdog timer from triggering—revisit with Bresenham's line
-algorithm.
+Stocks: Two weeks' EOD data from Polygon.io—maximum possible with 512 KB RAM.
+Flask API on a VPS manages the watchlist, relays the feed. The API is exposed
+via chroot-ed htpasswd + slowcgi + httpd.
 
-News: Used Channel NewsAsia RSS feed for news. Hand-coded the XML parsing in
-C—no Flask backend at the time. Now that I have one for stocks, will move the
-feed through the Flask backend in the next revision.
+News: Channel NewsAsia RSS feed. Parsed XML on the MCU as there was no Flask
+backend at the time. Now that I have one for stocks, moving it through the
+backend in the next revision.
 
-epd_init() stalled intermittently on first refresh() after flash. Toggling
-delay values in refresh() resolved it. If the first refresh succeeded, system
-remained stable. Could not find the root cause. Suspect noisy supply due to
-powering display via MCU.
+epd_init() stalled intermittently on first refresh() after flash. If the first
+refresh succeeded, the system remained stable. Could not find the root cause.
+Suspect noisy supply caused by powering the display via the MCU.
 
 Commit: <a
 href="https://git.asciimx.com/etlas/commit/?id=a92c86ac1592c2137d3d1fec1668eacc2d0ca581"